What is this passage mainly about? (The Beaver Comes Back)
Read an Informational Passage · ELPAC Grades 6–8 reading. The correct answer, and the reasoning behind it.
A longer factual text, with questions about the main idea, supporting details and vocabulary.
Read the passage. Then answer the questions.
The Beaver Comes Back
For most of the twentieth century, California treated the beaver as a nuisance. Trappers had already removed nearly all of them by 1850, and the animals that remained were often relocated or destroyed, because their dams flooded roads and pastures. By the 1940s many wildlife managers had concluded that beavers had never really belonged in much of the state.
That conclusion turned out to rest on thin evidence. Researchers working through fur-trade ledgers, mission records and old newspaper accounts found beavers described in rivers from the Oregon border to the edge of the Mojave. The animals had not been absent. They had been removed so early that nobody alive remembered them.
The distinction matters, because a beaver dam is not simply an obstruction. Water that slows behind a dam sinks into the ground instead of racing downstream, which raises the water table and keeps side channels wet into late summer. Those channels give young salmon cool places to grow, and the moisture they hold can slow a fire moving across a valley floor. After two recent Northern California wildfires, researchers found green vegetation standing around beaver ponds while the surrounding hillsides had burned.
None of this makes beavers easy to live with. A dam built in the wrong culvert still floods a road, and the consequence lands on a county budget rather than on a river. What has changed is the first response. California now runs a restoration program for the species, and a landowner facing a flooded field can request a flow device, a pipe set through the dam that lowers the pond without removing the animals that built it.
The question
Choose the best answer.
What is this passage mainly about?
- Beaver dams flood roads and cost county governments money.
- Trappers had removed nearly all of California's beavers by 1850.
- Young salmon need cool water in order to grow.
- Better evidence about beavers has changed the way California manages them.Correct answer
Why “Better evidence about beavers has changed the way California manages them.” is correct
A main-idea question asks which statement the whole passage is built to support, and here the passage has a clear four-part shape: the old view, the evidence that overturned it, why the difference matters, and what the state does now. Every wrong answer is a true statement taken from one paragraph, which is what makes this a main-idea question rather than a detail question. A good test for a student is whether a choice covers all four paragraphs or only one.
Why the other answers are wrong
- Beaver dams flood roads and cost county governments money. — Flooding is the problem the last paragraph concedes, and the passage moves past it to describe a different response.
- Trappers had removed nearly all of California's beavers by 1850. — The trapping is the opening fact that sets up the story; the passage then explains what people got wrong about it.
- Young salmon need cool water in order to grow. — Salmon appear in a single clause as one benefit of wet side channels.
Practice more of this
More reading practice for Grades 6–8, or see the ELPAC practice test for grades 6–8. For other grades, see free ELPAC practice tests by grade.
This is an independent study resource. It is not affiliated with, endorsed by, or connected to the California Department of Education or the official ELPAC program. All questions here are original practice material written to match the published task formats.