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Craft and StructureHardFunction of a sentence

Craft and Structure practice question

Honeybees communicate the location of food through a 'waggle dance.' The angle of the dance indicates direction relative to the sun, and its duration signals distance. This elegant system lets a single scout direct hundreds of bees to a flower patch it alone discovered.

Which choice best describes the function of the underlined final sentence in the text as a whole?

  1. A. It introduces a new topic unrelated to the waggle dance.
  2. B. It emphasizes the significance of the system just described.Correct
  3. C. It questions whether the waggle dance actually works.
  4. D. It provides step-by-step instructions for the dance.

Answer: B. It emphasizes the significance of the system just described.

After explaining how the dance works, the last sentence highlights why it matters ('elegant system … hundreds of bees'). It underscores significance rather than adding steps or doubting the claim.

Why the other answers are wrong

A. It introduces a new topic unrelated to the waggle dance.
The final sentence is still about the waggle dance — it refers to 'this elegant system' and the scout directing bees — so it extends the topic rather than introducing a new one.
C. It questions whether the waggle dance actually works.
Nothing in the sentence casts doubt; 'elegant system' and the claim that a scout can direct hundreds of bees affirm that the dance works.
D. It provides step-by-step instructions for the dance.
The step-by-step details (angle signals direction, duration signals distance) appear in the second sentence; the final sentence steps back to say why the system matters.

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