Final answer:
The appropriate text structure to describe the use of pesticides and the health problems associated with them is A) Cause and Effect. Hence, A) is correct.
Step-by-step explanation:
The appropriate text structure to describe the use of pesticides and the health problems associated with them would be Cause and Effect. This structure is used to explore the reasons (causes) behind an action or event and the consequences (effects) that result from it. In the case of pesticides, you would discuss the causes, such as the use of pesticides to control pests, and then explore the effects, such as the negative impact on human health.
For example, you could explain how the use of pesticides is intended to kill pests, but it can also lead to the contamination of food and water sources, increasing the risk of health problems in humans. By establishing this cause-effect relationship, you can provide a clear understanding of the issue.