42% devide 60 by 140 and get .42 or 42%
I believe the correct answer would be "different systems".
Hope it helps!
Answer:
They increase life expectancy and decrease population growth.
Explanation:
If less babies are dying and more families are able to raise them, then the population will flourish and more people will live to old age.
Carbohydrates are in place of simple sugars and complex carbs which either are quick energy or stored energy for performance. Without carbs, the body will shut down because you need sufficient energy to keep going. Carbs are what keeps you moving and functioning.
A.the intensity of the activity