Study the diagram given below and then answer the questions.
Role of plants and animals in the formation of ammonium compounds.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Role of Plants and Animals:**
- Plants and animals contribute to the nitrogen cycle through their life processes. When plants and animals die, their bodies decompose, releasing nitrogenous wastes.

2. **Decomposition Process:**
- The decomposition of dead plants and animals is carried out by microorganisms, including bacteria and fungi. These organisms break down the organic matter.

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