During this stage of normal human development the following occurs:
-The first phase of adolescence when sexual maturation occurs.
-It climaxes when girls first menstruate and boys show the presence of live sperm in the urine.
What is this stage of human development?
A) pubescence
B) adolescence
C) young child
D) pre-pubescence

A. Pubescence

This is because the human body is going through puberty

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.