Describe in your own words what cell respiration is and why it is needs

The cell respiration is a process in which the sugar molecules in the human body are broken into a form of energy which can be utilized by the cell. The cell respiration is needed to build up the adenosine triphosphate (ATP) and then it releases waste products from the cell. For this biochemical process, the cell uses oxygen hence, this process is also called aerobic respiration.

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 would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.