Define adolescence
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Adolescent is defined as a weightened self consciousness of the adolescent

Adolescence is the period of transition between childhood and adulthood.

Explanation:

Children who are entering adolescence are going through many changes (physical, intellectual, personality and social developmental). Adolescence begins at puberty, which now occurs earlier, on average, than in the past.

for question 8

1: it gets the blood pumping more

2: endorphins and other neurotransmitters