An optical illusion, caused by atmospheric conditions, in which nonexistent bodies of water are seen:

The answer is; mirage

Mirages are especially common in searing heat when the atmosphere close to the ground is greatly heated by the sun and refracts sunlight hence creating an optical illusion (like a pool of water when in fact it is dry land). The illusion is actually a displaced image of the sky.

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!