Question

fresh - water ecosystems consist of ponds, streams, rivers, lakes, wetlands, and aquifers. which of the following best describes these ecosystems?
(1 point)
○ low salt content, no photosynthesis
○ low salt content, surrounded by land
○ high salt content, high photosynthesis
○ high salt content, surrounded by land

Explanation:

Fresh-water ecosystems are defined by low salt content (distinguishing them from marine ecosystems). The listed examples (ponds, streams, rivers, lakes, wetlands, aquifers) are all surrounded by land. Photosynthesis occurs in fresh-water ecosystems (e.g., aquatic plants), so options mentioning "no photosynthesis" or "high salt content" are incorrect.

Answer:

low salt content, surrounded by land