Which type of organism primarily breaks down organic matter chemically and returns nutrients to the environment?

• A. Decomposers
• B. Detritivores
• C. Carnivores
• D. Pollinators

Answer: (A)

Decomposers are the organisms that primarily break down organic matter chemically, using enzymes to convert complex molecules into simpler compounds that nutrients can be recycled back into the ecosystem. Bacteria and fungi secrete enzymes like proteases, cellulases, and other digestive enzymes to break down proteins, carbohydrates, and other materials, releasing nutrients for plants and other organisms to reuse. Detritivores help by physically breaking apart material and aiding digestion, but their main role is not the chemical decomposition of matter. Carnivores eat other animals, and pollinators assist in plant reproduction, not in breaking down dead material for nutrient recycling.