The green scum seen in the freshwater bodies is

Options

A. Blue green algae
B. Red algae
C. Green algae
D. Both (a) and ((c)

Answer

To solve the question "The green scum seen in the freshwater bodies is," we need to analyze the options provided and understand the characteristics of the algae mentioned.

### Step-by-Step Solution:

1. **Understanding the Question**:
- We need to identify what causes the green scum in freshwater bodies. The options given are blue-green algae, red algae, green algae, and both A and C.

2. **Identifying Algae Types**:
- **Blue-Green Algae**: Also known as cyanobacteria, these are photosynthetic organisms that can form blooms in nutrient-rich waters, often giving a greenish appearance to the water.
- **Red Algae**: These typically thrive in marine environments and are not responsible for green scum in freshwater bodies. They can cause red tides but do not contribute to green scum.
- **Green Algae**: These are also photosynthetic and can be found in freshwater environments, contributing to the green coloration of the water.

3. **Analyzing the Options**:
- Since both blue-green algae and green algae can cause the green scum in freshwater bodies, we can eliminate red algae from consideration.
- Therefore, the options that contribute to the green scum are blue-green algae and green algae.

4. **Conclusion**:
- The correct answer is "both A and C," indicating that both blue-green algae and green algae are responsible for the green scum seen in freshwater bodies.

### Final Answer:
The green scum seen in freshwater bodies is **both A (blue-green algae) and C (green algae)**.

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