Which cellular structure is utilized by an amoeba for both locomotion and trapping food particles?

The correct option is Pseudopodia.

Explanation:
Pseudopodia, which literally translates to "false feet," are temporary, finger-like projections formed by the stretching of the cytoplasm and plasma membrane of an Amoeba.

Functions of Pseudopodia in Amoeba:
1. Locomotion: An amoeba moves by extending pseudopodia in the direction of travel and then flowing its cytoplasm into the newly formed extension, pulling the rest of the cell forward.
2. Trapping Food (Phagocytosis): When an amoeba comes into contact with a food particle, it extends its pseudopodia around the food item until they completely encircle and engulf it. The trapped food is then enclosed in a specialized membrane-bound sac called a food vacuole, where digestion takes place.

Overview of Incorrect Options:
• Cilia: Tiny, hair-like structures found on the surface of certain protozoans like Paramecium, used for swimming and directing food into the oral groove.
• Cell Wall: A rigid structure surrounding the cell membrane in plants, fungi, and bacteria. Amoebas lack a cell wall, allowing them to constantly change their shape.
• Flagella: Long, whip-like tails used for movement by organisms like Euglena or certain bacteria.