Strength building in leaves is necessary to support the overall structure of the plant and to withstand environmental stresses such as wind, rain, and snow. Strong leaves are also better able to support the weight of the plant's reproductive structures, such as flowers and fruits. Additionally, strength building in leaves helps to protect the plant from herbivores and pathogens, as tougher leaves are more difficult to consume and penetrate. Overall, strength building in leaves is essential for the survival and success of the plant in its environment. **

While relationships can provide many benefits such as emotional support, companionship, and personal growth, they are not a social necessity. Some individuals may choose to prioritize other aspects of their lives such as career, personal development, or friendships over romantic relationships. Ultimately, the importance of relationships varies from person to person, and what matters most is finding a balance that aligns with one's values and priorities. **

Strict universality refers to a statement that is true in all possible worlds, meaning it holds true in every conceivable scenario. Necessity, on the other hand, refers to a statement that is true in all possible worlds and cannot be false in any conceivable scenario. In other words, while strict universality applies to all possible worlds, necessity goes a step further by asserting that the statement cannot be false under any circumstances. Therefore, necessity implies strict universality, but strict universality does not necessarily imply necessity. **

It is not clear from the information provided whether the tomcat was neutered without necessity. Neutering is often recommended for pet cats to prevent overpopulation and reduce certain health risks, so it is possible that the neutering was done for a valid reason. However, if the neutering was done without a clear medical or behavioral necessity, it could be considered unnecessary. Without more information, it is difficult to determine the specific circumstances surrounding the tomcat's neutering. **

The phrase "Necessity knows no law" suggests that when faced with a situation where something is necessary or essential, people may feel justified in breaking rules or laws in order to fulfill that necessity. It implies that in times of extreme need or urgency, individuals may prioritize their immediate needs over following established laws or norms. This phrase highlights the idea that necessity can sometimes override moral or legal constraints. **

Document storage is necessary for several reasons. Firstly, it ensures that important information and records are safely preserved and easily accessible when needed. This helps in maintaining organization and efficiency in both personal and professional settings. Additionally, document storage helps in complying with legal and regulatory requirements, as certain documents may need to be retained for a specific period of time. Overall, document storage plays a crucial role in safeguarding valuable information and ensuring smooth operations. **

Strict universality refers to a statement that is true in all possible worlds, while necessity refers to a statement that is true in all possible worlds by virtue of its logical structure. In other words, strict universality is a broader concept that encompasses all possible worlds, while necessity specifically refers to the logical necessity of a statement. Strict universality is a more general concept, while necessity is a more specific and stringent requirement for a statement to be true in all possible worlds. **

Time zones are necessary to create a standardized way of measuring time across different regions of the world. They help to coordinate activities, such as travel and communication, by ensuring that everyone is on the same schedule. Without time zones, it would be difficult to accurately schedule events or coordinate activities across different regions that experience daylight and darkness at different times. Time zones also help to prevent confusion and ensure that people can effectively plan their daily activities. **