Write the harmful effects of fungi and algae.

Explanation

### Step-by-Step Solution:

**1. Understanding Fungi:**
- Fungi are heterotrophic organisms, meaning they cannot produce their own food and rely on other organisms for nourishment.
- They lack chlorophyll, the pigment necessary for photosynthesis.

**2. Harmful Effects of Fungi:**
- **Crop Damage:** Fungi such as smuts and rusts are known to damage crops significantly, leading to reduced agricultural yield.
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