Which one of the following statements contains an example of an explanation?

a. global warming is having impacts on weather patterns across the planet.
b. blizzards have become more common on the east coast in recent years.
c. whenever it gets too cold outside, my husband worries about the pipes freezing.
d. the thermostat, which controls the temperature in the house, broke last night.

Which statement best evaluates the author's use of pacing in the passage? a. the author's use of pacing is not effective, because the imagery and figurative language don't adequately describe either the cheetah or the gazelle. b. the author's use of pacing is effective, because the imagery and figurative language speed up the action, making the scene come alive for the reader. c. the author's use of pacing is effective, because the long, complex sentences the reader fully understand the power and beauty of nature. d. the author's use of pacing is not effective, because the long, complex sentences distract from the sense of stress and anxiety the passage should convey.