What is the role of decomposers in an ecosystem?

• A. To produce energy for plants
• B. To break down dead organisms and recycle nutrients back into the soil
• C. To provide shelter for other organisms
• D. To compete for resources with other organisms

Answer: (B)

Decomposers play a vital role in the ecosystem by breaking down dead organisms and recycling nutrients back into the soil. This process is essential for maintaining soil health and fertility. As decomposers, such as bacteria and fungi, decompose organic matter, they convert complex materials from dead plants and animals into simpler substances. This not only helps to cleanse the environment by disposing of waste materials but also enriches the soil with nutrients, making them available for plants to use. This nutrient cycling supports plant growth, thereby sustaining the entire food web in the ecosystem.

In contrast, producing energy for plants is the function of producers, such as plants themselves, which utilize sunlight for photosynthesis. Providing shelter is typically the role of specific organisms, such as trees or bushes, while competition for resources refers to interactions among various organisms that vie for limited supplies, such as food and space, rather than contributing to the nutrient cycle. Thus, the unique function of decomposers in breaking down organic matter and recycling nutrients is crucial for ecosystem stability and health.