Nonpoint source pollution is difficult to control because it . a. comes from a direct point of origin b. comes from a variety of sources c. remains the same over time d. none of the above Please select the best answer from the choices provided

The correct option is B.

comes from a variety of sources

Explanation:

Nonpoint source pollution is a form of pollution that is generated from different sources which include land runoff, rainfall, seepage, deposits from atmosphere and drainage, and seepage. Nonpoint source pollution is cause from rain falls as a result, its water flow through the ground , therefore the runoff wash and pick the pollutants and discharge them into water bodies. Nonpoint source polution is very difficult to control because it's originate from different type of sources.

d. groundwater flows through the subsoil and deposits minerals.

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.