What role do decomposers play in an ecosystem?

Decomposers play a vital role in ecosystems by breaking down dead organic matter, such as fallen leaves, dead animals, and waste products, which are crucial for nutrient cycling. They consume this organic material, breaking it down into simpler substances. This process returns essential nutrients, like nitrogen and phosphorus, back into the soil, making them available for plants to use. This recycling of nutrients supports the growth of new plant life, which is fundamental for the energy flow in ecosystems.

The correct answer highlights the integral function of decomposers in moving nutrients back to the abiotic system, ensuring that essential elements are not lost but instead reused and recycled within the ecosystem. This allows for the sustainability of life, enabling various organisms to thrive.