Question

5 what is the main idea of this text? a nitrogen and argon are necessary gases found in many layers of the earth, including the troposphere. b weather on the surface of the earth is constantly changing, which causes large storms to happen. c a small part, 1%, of the troposphere is made of argon, water vapor, and carbon dioxide. d the troposphere is the layer of earths atmosphere closest to the surface of the earth where all living things reside.

Explanation:

To determine the main idea, we analyze each option:

• Option A: Focuses on nitrogen and argon in Earth's layers, but the main idea likely relates to the troposphere (implied by other options).
• Option B: Discusses weather and storms, which is not the main focus of a text likely about the troposphere.
• Option C: Provides a detail (1% composition) of the troposphere, not the main idea.
• Option D: Defines the troposphere as the layer closest to Earth's surface where all living things reside, which is a core, overarching idea about the troposphere.

Answer:

D. The troposphere is the layer of Earth's atmosphere closest to the surface of the Earth where all living things reside.