Why does the density increase when salt is added to water? ?

Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much.

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.

it's c. (to reduce the greenhouse effect/carbon gasses)