Discuss three characteristics of microorganisms.

Explanation

### Step-by-Step Solution

1. **Definition of Microorganisms**:
Microorganisms are very small organisms that cannot be seen with the naked eye. They require a microscope for observation. This characteristic highlights their minute size and invisibility.

2. **Natural Decomposers**:
One of the key characteristics of microorganisms is their role as natural decomposers. They break down organic matter, which helps in recycling nutrients in the ecosystem. This decomposition process enriches the soil, making it more fertile and supporting plant growth.

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