The correct answer for 1 should be
a- the child's living and economic situation
b- medical and psychological problems
c- insufficient calorie intake
An economic situation where children are poor can lead to insufficient calorie intake or choice of poor food that is not good enough for children. Medical and psychological problems can also lead to being undernourished. Drinking water is a welcome thing and should be done.
The correct answer for 2 is
a- pregnancy
b- early childhood
c-puberty
At the conception the fetus has not yet formed well and you can't influence it. It can however be influenced during pregnancy, early childhood, and puberty, and genes can be changed and activated differently which can cause harm to children.