Exchange of nutrients, gases, and waste molecules occurs across capillary walls. fluid is also exchanged. most of the fluid is moved by which, in turn, is due to the pressure differences between the capillary fluid and interstitial fluid.

The correct answer is filtration.

The small molecules can cross in and out of the capillaries through facilitated or simple diffusion. However, the majority of the flow of capillary and tissue fluid takes place through the process of filtration and reabsorption. Filtration refers to the movement of the fluid out of the capillaries and is mediated by the capillary hydrostatic pressure.

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.

looks like the answer is     c     to me!