If a passage explains how rain benefits crops, what is the author's likely purpose?

• A. To entertain.
• B. To inform or explain a process.
• C. To describe a scene.
• D. To persuade.

Answer: (B)

The central idea being tested is the purpose behind the author's writing. When a passage explains how rain benefits crops, the author is focused on giving information about a natural process and its effects on agriculture. That means the primary aim is to inform or explain how something works, rather than to entertain with stories, to paint a scene with vivid description, or to persuade the reader to adopt a viewpoint or action. You’d expect factual details or explanations of cause-and-effect—how rain provides moisture, supports growth, helps with nutrient uptake, and benefits crops—without trying to amuse or argue a position. That’s why informing or explaining a process is the best fit.