Question

The pesticides need to be replaced because:

• A. they are very costly
• B. they cannot be stored for a long time
• C. they are mostly toxic/poisonous and non-biodegradable
• D. they cause abnormalities in the target population

Answer 1

The correct option is C

they are mostly toxic/poisonous and non-biodegradable

Pesticides are chemicals that are used to neutralize or kill harmful microorganisms and pests, such as rodents or insects, to protect crops.
Although useful, excessive use of these chemicals creates problems, since they can be poisonous to many plant and animal species and cause environmental pollution.