For each item, decide whether the topic listed for the paragraph is too broad, too narrow, or the
correct topic for the paragraph. Choose the letter of the correct answer.
Noise can increase the secretion of adrenaline1
in humans, perhaps because our distant ancestors
associated loud sounds, like a lion's roar or a baby's scream, with danger. The greater the sound,
the greater the adrenaline rush. Dr. Les Blomberg theorizes that racetracks try to be as loud as
possible because the noise excites the fans. "That's why exercise classes crank up the decibels,2
and rock bands, and action movies," he observes. "In effect, noise becomes a drug they're
pumping out and into you."
Adapted from Richard Wolkomir and Joyce Wolkomir, "Noise Busters," Smithsonian, March 2001, 99.
Topic: Noise
a. too broad
b. too narrow
c. correct topic
a
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