The two types of freshwater ecosystems are: a. flowing-water and wetlands c. flowing-water and standing-water b. standing-water and estuaries d. wetlands and estuaries

C. Flowing-water and standing-water

The correct answer is C. Flowing-water and standing-water-

Explanation

The two types of freshwater ecosystems are running water and standing water. The first, as its name indicates, refers to all those bodies of water that have movement, for example, rivers, streams, ravines, among others. The second refers to the bodies of water that, as their name indicates, are stagnant or lack movement, for example, lakes, lagoons, swamps, among others. So, the correct answer is C. Flowing-water and standing-water.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.