CBSE Class 10 Answered

The pesticides enter a food chain and subsequently get into our body by the following way: 

• Pesticides are sprayed on the crop plants to protect them from the attack of pests. These pesticides when washed away into the soil or water bodies get absorbed by the plants. 
• When plants are consumed as food by man or other animals, the pesticides enter the food chain. Since the pesticides are non-biodegradable, these chemicals get accumulated progressively and enter our body.