Question

1. which of the following is the main idea of paragraph 2?

a. the history of the hubble space telescope
b. background on the cosmic background explorer satellite
c. the explanation of the big bang theory
d. discussion of evidence that supports theories

Explanation:

To solve this, we analyze each option:

• Option A: Focuses on the Hubble Space Telescope's history, which is likely not the main idea if the paragraph is about cosmic theories/evidence.
• Option B: Discusses the Cosmic Background Explorer satellite, which is a specific satellite, not a main idea about cosmic theories.
• Option C: Explains the big bang theory, but the question is about the main idea of a paragraph (likely related to evidence, not just explanation).
• Option D: Discusses evidence supporting theories (likely cosmic theories like big bang, related to cosmic background or telescopes as evidence sources). This aligns with a paragraph’s main idea being about supporting evidence for cosmic theories.

Answer:

D. Discussion of evidence that supports theories