A relationship in which one organism is helped and another organism is neither helped nor hurt is called

Commensalism

Explanation:

Commensalism is when one organism is helped while the other is neutral (neither hurt nor helped).  Example: clownfish and anemone.

the answer is c.) there is a warm front in region a and a stationary front in region b.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.