Explain how pesticides, manure and human hair can cause ill health to human beings

Pesticides- Can affect your fruits/ veggies if you neglect to wash before consuming, and can make you extremely ill.
Manure- If the animal used for meat was not properly cleaned/washed before being packaged, you will get the manure germs.
Human hair- If the hair of a human or even an animal (i.e. rat) was found in food/drink that you consumed, you could have hair balls, grease and bacteria floating around the insides of your body.

Perform surgeries is the correct answer.