Biologically, a child (plural: children) is generally a human between the stages of birth and puberty.^[1][2] The legal definition of child generally refers to a minor, otherwise known as a person younger than the age of majority.^[1]

Child may also describe a relationship with a parent (such as sons and daughters of any age)^[3] or, metaphorically, an authority figure, or signify group membership in a clan, tribe, or religion; it can also signify being strongly affected by a specific time, place, or circumstance, as in “a child of nature” or “a child of the Sixties”.^[4]

There are many social issues that affect children, such as childhood education, bullying, child poverty, dysfunctional families and in developing countries, hunger. Children can be raised by parents, in a foster care or similar supervised arrangement, guardians or partially raised in a day care center.

Source: Wikipedia, Link