Water quality is a great concern for sub Sub Saharan Africa's rural population. It is basically a region where water is very scarce and finding the right quality of water for drinking and cooking purposes is very hard for the rural people of this region. I hope the answer helps you.
Answer:
Correct, varying hours of sunlight. Winter days are shorter, summer days are longer, or show more sunlight.
Explanation:
Latitudes don`t change
It can`t "cause day and night"
Physical signs : Headache
Emotional signs : Happy,guilty,
Behaviour signs : loss of interest, personality
