If a sound is refracted away from the surface of the earth, this indicates that the a. air is cooler than the ground. b. wind is blowing in the direction of the sound. c. ground is cooling faster than the air. d. air has high humidity.

The correct answer is option A, that is, air is cooler than the ground.

Explanation:

Refraction refers to a phenomenon in which there is a modification in the direction of propagation of any wave as a consequence of its mediating at distinct velocities and at distinct points along the wavefront.  In case, when a sound from s source is refracted away from the Earth's surface, there is an indication that the air present above is cooler in comparison to the ground making the sound to refract towards the less dense medium.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

not sure if this is what you'r looking for nnew= nold