Endocytosis is an energy-using process. The answer is A.
A way we can reduce disadvantages of human made materials is simply by finding new uses for them such as when plastic is molded and used for a container of a liquid.
Part A:
A - cell/plasma membrane.
B - Nucleus
C - mitochondrion
Part B:
A - (cell membrane) regulates what enters and leaves the cell.
B - (nucleus) controls cell activities or contains the genetic codes.
C - (mitochondrion) respiration or energy release or production of ATP.
Part C:
Photosynthesis
Production of cellulose
Produces chlorophyll
Producing its own food
Hope this helps you! (:
-PsychoChicken4040