Depends on the circumstances. In a health field however, a persons work environment could be the reason for illness/injury. Most people spend a great deal of time at work. I believe you should ask work related questions, but do not HAVE to.
Answer:
Your body's mass composition changes as you grow older
for gender, females tend to have more fat than males do
Explanation:
up to 5 hours if you don't open it
use dictionary to find out meanings and also take help from TB material
