child marriage

throughout the world

social

pupil, student (a child who goes to elementary school) / (law) child, juvenile, person(s) under 18 years of age under the Japanese Child Welfare Law

a phenomenon

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

society (group of people sharing culture) / a class, a world of a certain group

a target, a mark, a bullseye / an objective, an object (of doing something)

as far as ... is concerned; in terms of ...

marriage