5
Answer: BSet 1: Text Structure
Explanation
PASSAGE
Most plants need sunlight to grow. However, some fungi can grow in complete darkness. These fungi get their energy from decaying organic matter instead of the sun.
Which choice best describes the function of the underlined sentence?
A. It gives an example of a plant that loves the sun.
B. It introduces an exception to the rule mentioned previously.✓ Correct
C. It argues that sunlight is bad for all living things.
D. It explains the process of photosynthesis.
Detailed Explanation
The first sentence sets a rule (need sunlight). The second says 'However' and introduces fungi that don't need it (exception).
Key Evidence:
• "However"
• "grow in complete darkness"
Why others are wrong: A (Fungi are not plants, and they don't use sun here.), C (It doesn't say sunlight is bad.), D (Photosynthesis is not explained.).