I found the answer to be cells
It depends on your teacher, it should be A. It could be B if that’s what your teacher wants but I would go with A.
Answer:
Pinocytosis is the mechanism by which living cells consume liquid droplets. Endocytosis is the general mechanism by which cells ingest foreign substances and collect them in special membrane-bound vesicles within the cell. Pinocytosis is one form of endocytosis.