Answer:
https://www.ncbi.nlm.nih.gov/books/NBK279457/
Explanation:
all the stuff right here bud or girl GOOD LUCK
Lifting a weight 10 times is a kind of ISOTONIC contraction. Holding a heavy machine part steady while securing it in place may be categorized as ISOMETRIC contraction. Lifting heavy cans and putting them on a shelf may be called an ISOTONIC contraction. Flexing your leg muscles and holding the flex is an ISOMETRIC contraction. Lifting your heavy book bag several times is good ISOTONIC contraction.
Explain that even though he has already had sex, it is ok to change his mind.
Suggest that he talk to a trusted adult.
The other options may offend a person
Communication is key in a relationship. This can help them talk through their problems