The use of water from water bodies as a _______ in industries makes the water hot, and deficient in oxygen.

Options

A. coolant
B. pesticides
C. decomposers
D. Both (b) and ( c)

Explanation

To solve the question, we need to fill in the blank with the correct term that describes the use of water from water bodies in industries. Let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Context**: The question discusses how water from water bodies is used in industries and how this affects the temperature and oxygen levels in the water.

2. **Identifying the Options**: The options provided are:
- A. Coolant
- B. Pesticides
- C. Decomposer
- D. Both B and C

3. **Analyzing Each Option**:
- **A. Coolant**: This refers to a substance used to absorb heat from machinery, which is relevant in industrial processes. Water is commonly used as a coolant because it is inexpensive and effective at absorbing heat.
- **B. Pesticides**: These are chemicals used to kill pests and are not relevant to the context of water use in industries.
- **C. Decomposer**: This refers to organisms that break down dead organic material, which does not relate to the industrial use of water.
- **D. Both B and C**: Since both B and C are not relevant, this option is also incorrect.

4. **Conclusion**: The most appropriate term to fill in the blank is "coolant" because it directly relates to the use of water in industries to manage heat from machinery.

### Final Answer:
The use of water from water bodies as a **coolant** in industries makes the water hot, and deficient in oxygen.

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