Question 1: 4. What is the main idea of this passage?

• Beavers may be hard-working animals, but they don't always choose the most efficient mechanisms. (Correct answer)
• Beavers are excellent dam builders.
• New Hampshire was the site of the largest beaver dam.
• Beavers are well-developed tree cutters.
• Beavers are poor surveyors of aquatic environments in some cases.

Correct answer: Beavers may be hard-working animals, but they don't always choose the most efficient mechanisms.

A main idea often presents a central argument or a nuanced perspective. This option suggests that while beavers are widely recognized for their industriousness, the passage likely delves into instances where their methods are not always the most efficient. This offers a more complex and critical view of beaver behavior than simply stating their dam-building or tree-cutting abilities.