The refer(s) to the prohibition against intercourse and reproduction amongst close family members. a. Principles of asceticism b. Incest taboo c. ""Concubine"" d. Victorian sexual repression

b. Incest taboo

Explanation:

An incest taboo can be define as the cultural rule that prohibits the sexual intercourse and making sexual relationships between closely related individuals such as brother-sister, mother-son, father-daughter or development of sexual relationship between the blood relatives.

All human cultures have principles or norms to exclude the sexual intercourse between the close relatives while being in a married status or remaining unmarried.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.