Cytokinesis in animal cells happens when the: A: cell wall pinches in to separate the cytoplasm.
B: cell plate forms across the middle of the cell.
C: chromosomes line up in the middle of the cell.
D: cell membrane pinches in to separate the cytoplasm.

D

Explanation:

Cytokinesis is basically the formation of 2 new  cells. C describes metaphase and A and B are talking about cytokinesis in a plant cell because animals don't have cell walls or plates. So the right answer has to be D

The main purpose for photosynthesis would be to use sunlight energy to make glucose and oxygen. as for cellular respiration, the main purpose is to create carbon dioxide and water, but the most important is that it creates ATP, which can be used for energy.