Answer:
physiological motivator
Explanation:
because when you buy a phone your physiological reaction is triggered.
B and C are correct - A is incorrect as natural selection affects any generation of species. D is also incorrect as any species population change in an ecosystem inevitably affects another, even if it isn't a predator-prey relationship.
Answer:
C. Because your body cannot accurately sense when your muscles are done working hard.
Explanation:
Energy can’t be created or destroyed.
