4. When a kangaroo jumps, the kangaroo's action force acts on the ground, what would be the reaction force?
acts on the kangaroo
c. lesser than the action force
b. exerted by the ground
d. greater than the action force
a

D

Explanation:

because after the jump it will gain force forst

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."