Read the paragraph.Every year, over 300,000 kids go to the emergency room for bike injuries. For this reason, everyone who rides a bike should wear a helmet, no matter what age. Helmets help to provide protection to one’s face, brain, and head in the event of an accident.

The paragraph gives a reason—more than 300,000 children go to the emergency room for bike injuries—and uses it to support the opinion that everyone who rides a bike should wear a helmet. It also explains how helmets protect riders. The author’s purpose is to argue for wearing helmets, not to tell a story or investigate a question.

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