Question

1. the main idea of the text is —

a. all microorganisms can be deadly.
b. scientists are working to keep people safe from germs.
c. it is important to protect yourself from germs.
d. some germs are harmful, but most germs are helpful.

Explanation:

To determine the main idea, we analyze each option:

• Option A: "All microorganisms can be deadly" is incorrect as many germs are helpful, so this is an overgeneralization.
• Option B: The text likely isn't focused on scientists' work (no info suggests that), so this is not the main idea.
• Option C: While protecting from germs is important, the main idea here is about the nature of germs (helpful vs. harmful), not just protection.
• Option D: This aligns with the common understanding of germs—some are harmful (like pathogens), but most are beneficial (e.g., gut bacteria, decomposers), so it's the most accurate main idea.

Answer:

D. some germs are harmful, but most germs are helpful.