Final answer:
Amoeba uses endocytosis to ingest food, while paramecium uses cilia and an oral groove.
Step-by-step explanation:
In amoeba, ingestion occurs through a process called endocytosis. The amoeba extends pseudopodia and engulfs its food, forming a food vacuole. Digestive enzymes are then released into the vacuole to break down the food particles. Waste is eliminated through exocytosis.
In paramecium, ingestion is done through cilia and a specialized structure called the oral groove. The paramecium sweeps its cilia to create a current that brings food particles into the oral groove. From there, the food is transported into a food vacuole, where it is digested by enzymes. Waste is eliminated through an pore.