occurs when the cell membrane surrounds and engulfs large particles, such as white blood cells engulfing bacteria. a Pinocytosis
b Phagocytosis
c Exocytosis
d Receptor-mediated endocytosis

Phagocytosis

Explanation:

During phagocytosis, cells engulf large particles such as bacteria, cell debris, or even intact cells (Figure 12.34). Binding of the particle to receptors on the surface of the phagocytic cell triggers the extension of pseudopodia—an actin-based movement of the cell surface, discussed in Chapter 11.

the sun d the answer is sun

the supermassive black hole is in the middle of the galaxy.