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frozen [14]
3 years ago
12

When he was 6 years old, Perry used to chase his older brother, Marcus, in the backyard, but got winded sooner than Marcus did.

Now that Perry is a 9-year-old, he can run faster and longer than ever before and has less trouble keeping up with Marcus's pace. This is a result of increased ____ in middle childhood.
Health
1 answer:
Inessa05 [86]3 years ago
3 0
Puberty ? I’m not sure
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