Health, population and environment education is introduced as an integrated subject due to profound interrelationship that exists among the subject matters of these three disciplines. The natural physical aspects and man- made things come under the physical aspect.
I would say the answer is D.
A lot of kids at party's drink heavily, Some don't drink and others drink moderatly
A. Scheduling time can help prevent you from avoiding exercise.
That would be the sebaceous gland
