Question

look at these details from a paragraph about the same topic: • floodwaters can add nutrients to the soil, improving the land for crops. • the extra water from floods can help some plants grow more quickly. • on the other hand, floodwaters can carry dangerous diseases. choose the main, or central, idea that ties all the details together. floods can destroy buildings and farmland. heavy rainfall is only one cause of flooding. floods can have both good and bad effects.

Explanation:

The details list positive effects like adding nutrients and aiding plant - growth, and a negative effect of floods like carrying diseases. So, the central idea is about both good and bad impacts of floods.

Answer:

Floods can have both good and bad effects.