Part A Read this excerpt from "Improving Old MacDonald's Farm."

It’s not just animals, though. Chemicals in pesticides, herbicides, fungicides, and fertilizers can also cause water pollution. Pesticides, herbicides, and fungicides are used to kill pests such as crop-eating insects and to control the growth of weeds and fungi. Fertilizers are used to feed crops and make them grow faster and healthier. Unfortunately, chemicals used to kill bugs and weeds can also damage other things. These chemicals can enter and contaminate water in several ways—through use and overuse in or around the water, from runoff, or by the wind. And their effects can be deadly. The chemicals can kill fish and other wildlife, poison food sources, and destroy the habitat that small animals use to hide from predators.

Which structure does the author use to organize information in this text?

cause and effect

compare and contrast

order of importance

chronological order
Question 2
Part B

How does the structure identified in Part A contribute to the development of ideas in the section of the article?

It describes the most harmful chemical before discussing progressively less harmful chemicals.

It lists the steps to follow when applying chemicals to crops.

It compares and contrasts different types of chemicals used in agricultural.

It explains the negative impact of several chemicals used in agricultural.