The u. s. census bureau defines the "family" as select one:
a. people who live together.
b. people who engage in economic cooperation.
c. people living together who are linked by birth, marriage, or adoption.
d. people who consider themselves to be a family.

(c) people living together who are linked by birth, marriage, or adoption

Explanation:

In US according to Census bureau the family is a group of two or more people who are related by birth, marriage, or adoption and they are living together.The family is a necessary part of the survival of any human beings because family members support each other when any of the family member is in need.

two or more people related by birth, marriage, or adoption who live in the same housing unit

Explanation:

The Census Bureau defines a family as a group of two or more people related by birth, marriage, or adoption who live in the same housing unit. A household may include unrelated people living in the same housing unit.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.

most cajuns resided in acadiana, where their descendants are still predominant