Answer:
Growth of actin filaments to form bulges in the plasma membrane.
Step-by-step explanation:
Actin filaments is a vital element in the body of unicellular organisms such as amoeba which is responsible for the movement of unicellular organism from one place to another. It also helps in the division of the cell and increase its population. This actin filament also helps the amoeba by engulf food substance for growth and survival.