The motion of a falling object from a height is linear motion

Yes ...the motion of a falling object from a height is linear motion.

Because If the body moves along the straight line then its motion is called a linear motion.

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.