Both matrilineal and patrilineal patterns of descent build kinship groups through either one genealogical line (the mother's side) or the other (the father's side), which reflects

a. ambilineality.

b. consanguinity.

c. unilineality.

d. patrilineality

Answer: C. Unilineality

Explanation: Unilineality is a system of determining descendant group in which one belongs to either the male (patriline) or female (matriline) both not both. Both patrilineal and matrilineal system are both examples of a unilineal system.

Ambilineal are non-unilineal where individual can be affiliated to more than one genealogical line.

Cosanguinity refers to being of the same descent with another individual.