Why is the study of population composition very useful? Give reason.

The composition of population means the distribution of the number of the population according to characteristics such as age,sex,marital status, socioeconomic status. it also helps us know how much food needs to be grown to feed everyone

Explanation:

beacuse there is way to many idiots on earth

Explanation:

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

you aren't worthless, you are a one of a kind person who, deserves happiness like anyone else, you may not get it but everyone deserves happiness. i hope this .