The correct option is A Pinocytosis
Pinocytosis also known as cell-drinking, fluid endocytosis, and bulk-phase pinocytosis, is a mode of endocytosis in which small particles are brought into the cell, forming an invagination, and then suspended within small vesicles. These pinocytotic vesicles subsequently fuse with lysosomes to hydrolyze the particles. This process requires a lot of energy in the form of adenosine triphosphate (ATP).