How are demographics used in the world we live in?

Well A census would be a great example for this, if i'm interpreting this correctly. Demographics can also be used to determine if a living species can be determined as Endangered.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.

your answer is "graduates" hope this