Final answer:
The study of the relationship of body size to shape, anatomy, physiology, and behavior is a key aspect of Biology.
Step-by-step explanation:
The study of the relationship of body size to shape, anatomy, physiology, and behavior is a key aspect of Biology. This field of study helps us understand how different body sizes and shapes influence various biological processes and behaviors in organisms. For example, the proportion size relationship of the parts of a body or form to one another is important in determining an organism's ability to interact with its environment. Factors such as limits on animal size and shape, bioenergetics, and diffusion play a role in this relationship.