There are four ponds near Brian's house. He visits each one and writes notes about the plants and animals that he sees.
Location Notes
Pond 1 two kinds of small fish, two kinds of plants, two turtles
Pond 2 surface covered by algae, few visible fish, two kinds of plants
Pond 3 two kinds of large fish, mostly one kind of plant
Pond 4 four kinds of fish with varying sizes, four kinds of plants, two turtles
Based on Brian's notes, which pond's ecosystem is likely to be the most sustainable?
A.
pond 1, because there are fewer insects affecting other organisms
B.
pond 3, because larger fish are better at surviving
C.
pond 2, because there are more algae performing photosynthesis
D.
pond 4, because it has the greatest biodiversity