In legal terms, how is a child defined?

The definition of a child in legal terms typically encompasses a broader spectrum that includes not just age but also the capacity for self-support. The correct choice accurately reflects that a child is recognized as an individual under the age of 18 or someone who is unable to support themselves, which aligns with various legal contexts including family law and welfare considerations. This definition is crucial because it recognizes the developmental and social factors impacting a child's ability to be independent.

In contrast, other definitions such as those based solely on specific age limits, school attendance, or government assistance do not universally capture all minors under various legal statutes. Many laws provide protection and rights to individuals who may be over a certain age but still lack the capability for self-sufficiency. Thus, the choice that includes both age and the capacity for self-support offers a more comprehensive understanding of a child's legal status.