Final answer:
Endocytosis is a type of active transport where a cell pushes out large particles, like waste, by forming a pocket and engulfing the particle into a newly created intracellular vesicle.
Step-by-step explanation:
Endocytosis is a type of active transport that moves particles, such as large molecules, parts of cells, and even whole cells, into a cell. The cell's plasma membrane invaginates, forming a pocket around the target particle. The pocket pinches off, resulting in the particle containing itself in a newly created intracellular vesicle formed from the plasma membrane.