Passage: Bridges help people cross rivers, roads, and valleys. Engineers choose materials and shapes that can hold weight. A beam bridge uses strong horizontal beams. An arch bridge sends weight down and outward through its curved arch. A suspension bridge uses tall towers and cables to carry the load. Engineers test models before building a real bridge. What is the main idea of the passage?
Please select an answer first.
Correct answer: A
The correct answer is Different bridge designs use different structures to carry weight safely.
- Read the passage: Look for the main idea, important details, sequence, and clues in the text.
- Use text evidence: The passage describes several bridge designs and explains how engineers make them strong.
- Check the answer: The correct choice is Different bridge designs use different structures to carry weight safely.
The passage describes several bridge designs and explains how engineers make them strong.
