Why the world focuses on the ‘girl child’

In northern Nigeria, and in fact certain countries all over the world, child marriage is a serious problem that affects girls only.
A Quick Guide to Gender Terms Every Ally Should Know

Just like sexuality, gender identity is a lot broader and more nuanced than we as a society seem to acknowledge. The truth is, in an ideal world, labels shouldn’t be that important. We’d all live in a world where everyone could exist – fully, as themselves, without having to constantly explain or define what side of the “side” of the spectrum they fall.
All you need to know about Gender Identity

Gender Expression is a person’s behaviour, interests, mannerisms, and appearance that are often linked with gender specifically masculinity or femininity.