Why do you think it is important to know your heart rate before and after exercise ? Please explain how it helps!

Yes

Explanation:

It is important because it makes you look to targeted zones to reach your goal. In fact, weight loss and better fitness are easier to achieve with calculated results in mind. As a result of your efforts, your body responds by using oxygen more efficiently than before.

answer is b

  a   having low self-esteem

  b   having abusive family members

  c   having poor school attendance

  d   having friends who discuss gang life

living torture and being abused makes one not mind harming other people.

and also not being supported and abusing one turns one into this state.

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.