Define decomposition

Answer

### Step-by-Step Solution:

1. **Definition of Decomposition**:
- Decomposition is a biological process that involves the breakdown of dead organic substances.

2. **Process of Decomposition**:
- During decomposition, these dead organic materials are broken down into simpler organic or inorganic substances.

3. **Products of Decomposition**:
- The simpler substances produced through decomposition include carbon dioxide, water, and minerals.

4. **Role of Decomposers**:
- Decomposers such as fungi, bacteria, and earthworms play a crucial role in this process by consuming the dead organic matter and facilitating its breakdown.

5. **Nutrient Cycle**:
- The nutrients released during decomposition enrich the soil, which in turn supports the growth of plants, creating a cycle of nutrient transfer between the soil and living organisms.

6. **Illustration of the Process**:
- An example of this process can be seen when a leaf falls from a tree. It may be consumed by insects, and the remaining parts are decomposed by microorganisms, contributing to the nutrient content of the soil.