Answer:
C. endocytosis
Explanation:
Endocytosis is a process that occurs in cells and aims to bring substances into this structure through the invagination of the plasma membrane. These invaginations are nothing more than folds in the membrane itself into the cell. We can say that through endocytosis the cells "drink" and "eat".
Endocytosis occurs in both multicellular and unicellular organisms. In unicellulars, like protozoa, endocytosis is essential to ensure the nutrition of these cells. Therefore, endocytosis in these organisms works as the main way of obtaining food.
In multicellular organisms, in turn, endocytosis has a slightly different role. In us humans, for example, who have extracellular digestion, cells do not work guaranteeing our nutrition. In this case, endocytosis plays a major role in defense. This is the case with white blood cells in our body, which capture invading particles and organisms.
