Which of the following criteria defines a dependent child eligible for travel insurance coverage?

A dependent child eligible for travel insurance coverage is typically defined by specific relationship criteria that ensure they are financially reliant on the policyholder. The option that states "Unmarried and residing with the applicant" aligns with common industry standards for defining dependent children. This definition ensures that the child is under the direct care of the applicant, reinforcing the idea that dependents are individuals who are financially supported by the insured party.

Defining the dependent child based solely on age does not capture the necessary relationship or living situation; simply being under a certain age does not inherently imply dependency or living arrangement. Full-time employment is another criterion that does not reflect dependency; a child who is working may not be reliant on the parent or guardian for support and therefore may not meet the criteria set forth by travel insurance policies. Lastly, being married and caring for children indicates that the individual has established their own household and financial responsibilities, making them an independent adult rather than a dependent.

In summary, the definition of dependability in insurance focuses on the direct relationship and living situation with the applicant rather than just age or marital status, which is why the criteria of being unmarried and residing with the applicant is the correct choice.