How do decomposers contribute to the carbon cycle?

• A. They convert carbon dioxide into organic matter through photosynthesis.
• B. They store carbon in the form of fossil fuels.
• C. They absorb carbon dioxide from the atmosphere and convert it into oxygen.
• D. They release carbon dioxide into the atmosphere by breaking down dead organisms.

Answer: (D)

Verified step by step guidance

1. Understand the role of decomposers: Decomposers are organisms, such as bacteria and fungi, that break down dead organic matter, returning nutrients to the ecosystem.
2. Identify the process involved: Decomposers break down complex organic compounds in dead organisms into simpler substances, a process known as decomposition.
3. Connect decomposition to the carbon cycle: During decomposition, decomposers release carbon dioxide (CO2) back into the atmosphere as a byproduct of breaking down organic matter.
4. Clarify the misconception: Unlike plants, decomposers do not perform photosynthesis, so they do not convert carbon dioxide into organic matter or oxygen.
5. Summarize the contribution: Decomposers play a crucial role in the carbon cycle by recycling carbon from dead organisms back into the atmosphere as carbon dioxide, maintaining the balance of carbon in the ecosystem.