The organelle that helps in osmoregulation in Amoeba is

1. food vacuole

2. plasma membrane

3. contractile vacuole

4. lysosomes

The correct option is C

contractile vacuole

The correct option is C:

Explanation of the correct option

1. The contractile vacuole is found in freshwater protozoa and lower metazoans for example sponges and hydras.
2. The contractile vacuole gathers extra fluid from the protoplasm and periodically dries it into the surrounding medium.
3. Contractile vacuole supports the system of excretion and osmoregulation in Amoeba.

Explanation of the incorrect options

Option A:

1. A food vacuole is a membrane-enclosed sac which has a digestive function.

Option B:

1. The plasma membrane detaches the internal cell from the outside environment.

Option D:

1. A lysosome is a membrane-bound cell organelle that is involved in digestive enzymes.

Final Answer: The organelle that helps in osmoregulation in Amoeba is contractile vacuole.