The first outward sign of puberty is ) the rapid gain in height and weight known as the growth spurt(b) extreme moodiness, particularly toward adults(c) steady improvement in gross-motor performance(d) changes in physical features related to sexual functioning

(A) the rapid gain in height and weight known as the growth spurt

Explanation:

The first outward sign of puberty is the rapid gain in height and weight known as the growth spurt. Puberty is going to eventually happen to everyone and it's nothing to be concerned about. During this time, you should talk to your parents if you have any questions or concerns involving your body.

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