A farmer is growing a crop regularly in his field. He uses chemical fertilizers, pesticides, organic manure as well as bio-fertilizers. Very close to his field is a factory which emits smoke as a by product. There is also a huge lake in the nearby area.
Which of these is a way to prevent accumulation of harmful chemicals in our bodies ?

Options

A. Minimize the use of pesticides in agriculture
B. Minimize the use of CFCs.
C. Plant more and more trees.
D. All of these

Explanation

To answer the question about preventing the accumulation of harmful chemicals in our bodies, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Problem**: The farmer is using various agricultural inputs like chemical fertilizers and pesticides, which can lead to the accumulation of harmful chemicals in the environment and eventually in our bodies.

2. **Identify the Chemicals**: The primary concern here is pesticides, which are used to kill pests but can have harmful effects if they accumulate in the food chain.

3. **Consider the Options**:
- **Minimize the use of pesticides in agriculture**: This directly addresses the problem of harmful chemical accumulation since reducing pesticide use will lower the chances of these chemicals entering the food chain.
- **Minimize the use of CFCs**: While this is important for protecting the ozone layer, it does not relate to the accumulation of pesticides or other harmful chemicals in our bodies.
- **Plant more trees**: This is beneficial for the environment and can help with carbon dioxide absorption and global warming, but it does not specifically prevent the accumulation of pesticides in our bodies.
- **All of these**: This option suggests that all previous options are correct, which is not the case since only one option directly addresses the accumulation of harmful chemicals.

4. **Choose the Best Option**: The best way to prevent the accumulation of harmful chemicals in our bodies is to **minimize the use of pesticides in agriculture**.

### Final Answer:
The correct answer is **minimize the use of pesticides in agriculture**.

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