Import : In this process, food is sucked by depression into the body and there is no active role or movement of Amoeba takes place. Circumfluence : In this process, pseudopodia advances when it comes in contact with food and protoplasm surrounds the food particles and engulf them. Invagination : In this process, pseudopodia secretes a sticky and toxic substance. The food is adhered to the body by toxic substance and food invaginates to enclose it in a food vacuole. Circumvallation : Pseudopodia envelope the prey and forms food cup by meeting the ends of pseudopodia.