Question

what is the main role of decomposers in an ecosystem? *
to produce oxygen through photosynthesis
to break down dead organisms and recycle nutrients
to provide food for primary consumers
to regulate the population of other species

Explanation:

Decomposers like bacteria and fungi break down dead plants and animals, releasing nutrients back into the soil for plants to use again, which is crucial for nutrient - cycling in ecosystems.

Answer:

To break down dead organisms and recycle nutrients