Question

quiz: biomes and aquatic ecosystems
realizing earth a term a - period 1 - ma 350 (lms)
quiz: biomes and aquatic ecosystems (lms graded)
kevin is constructing an explanation of the importance of freshwater ecosystems. which of these statements would be most useful to include in the explanation?
a. freshwater ecosystems are distributed evenly across a continent.
b. freshwater ecosystems hold less than 3 percent of earths surface water.
c. freshwater ecosystems keep fresh water in one place, and do not release it.
d. freshwater ecosystems stay about the same during the year.

Explanation:

Freshwater ecosystems are crucial as they hold a small but vital portion of Earth's surface water. Option B highlights this important fact. Option A just mentions distribution, option C is incorrect as water in ecosystems is dynamic, and option D is not a key importance - ecosystems can change seasonally.

Answer:

B. Freshwater ecosystems hold less than 3 percent of Earth's surface water.