Final answer:
The subject of this question is Biology. Biologists have observed a mathematical relationship between the running speed of animals and their overall body length.
Step-by-step explanation:
The subject of this question is Biology. Biologists have observed a mathematical relationship between the running speed of animals and their overall body length. This relationship is an important concept in the field of biology and is studied to understand how different traits and adaptations in animals affect their ability to move.