Respuesta :
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
The answer is: D - sun, algae, snails, starfish, bacteria
Explanation:
Sun - producer
Algae, Snails, Starfish - consumer
Bacteria - decomposer
Explanation:
Sun - producer
Algae, Snails, Starfish - consumer
Bacteria - decomposer