A pond, rich in various microorganisms, dries up due to drought. How will the amoeba in the pond protect themselves from this unfavorable condition?

The correct answer is : by secreting a thick cell wall which encloses many amoebae in it to prevent loss of water, forming a cyst until favorable conditions emerge

Explanation:

Amoeba protects itself in unfavorable conditions such as drought or less water or food availability. Amoeba takes back all its pseudopodia and secretes a thick cell wall which form three layer hard covering arout amoeba body.

This hard covering is known as the cyst  and this process known as the encystation. Amoeba remain in this cyst form until favorable conditions emerge.

Thus, the correct answer would be - by secreting a thick cell wall which encloses many amoebae in it to prevent loss of water, forming a cyst until favorable conditions emerge