A is the correct answer
population density = # of individuals/amount of area.
The human first appear in geological time 6million years ago in the Miocene epoch. The modern humane evolve just 200,000 years ago
B) 3.0
The mechanical advantage of the ramp is 3.6
/1.2 or 3.0. MA of a ramp is length/height.
Explanation:
operant conditioning - a technique that uses rewards to increase a learned behavior
optimality theory -a theory that behavior evolves to promote the greatest fitness for the animal
social learning - learning a behavior by observing and watching others
organizational effects - long-term hormonal influences on animal behavior usually occurring early in life.
Hope it helps