Answer:
A
Explanation:
that duration one lives from birth to the day of death is life expectancy
The items that can contribute to heart disease is C. Nitrogen oxides and carbon monoxide. These are the chemicals that contribute to pollution. Carbon monoxide is the product from a combustion that can affect our respiratory system whenever we inhale this gaseous chemical. And nitrogen oxides can affect and penetrate areas of the body when inhaled in which our respiratory organs may be affected by diseases because of this chemical.
B. Maximum Lightheadedness Because being light headed is not a benifit in any way
During exercise, an individual's heart rate tends to increase steadily until a level of consistent intensity has been reached. Correct answer:C Afterwards the heart rate decreases back to normal.
As a result of increased exercisethe volume of blood pumped by the heart increases
