A farmer was using pesticides on his farm. He used the produce of his farm as food for rearing fishes, He was told that fishes were not fit for human consumption because large amount of pesticides had accumulated in the tissues of fishes. Explain how did this happen ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Use of Pesticides**: The farmer uses pesticides on his farm to protect his crops from pests. These pesticides are chemicals designed to kill or control harmful organisms.

2. **Transfer of Pesticides to Crops**: When the farmer applies pesticides to the soil, these chemicals can be absorbed by the plants. This means that the pesticides are transferred from the soil into the crops that the farmer grows.

3. **Feeding Crops to Fish**: The farmer then uses these pesticide-treated crops as food for rearing fish. This is where the problem begins, as the fish consume the crops that contain pesticide residues.

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