Question

Which of the following is a complete ecosystem? *
A. sun➡️algae➡️snails
B. sun➡️algae➡️snails➡️starfish
C. sun➡️algae➡️snails➡️starfish➡️seagulls
D. sun➡️algae➡️snails➡️starfish➡️bacteria

Answer 1

There ain’t much context but I would say D. Because it expands the food chain to the 3rd consumer which, in my opinion, would complete an ecosystem

Answer 2

The answer is: D - sun, algae, snails, starfish, bacteria

Explanation:

Sun - producer

Algae, Snails, Starfish - consumer

Bacteria - decomposer