An informant tells a fieldworker that the preferred marriage custom in his culture is for a man to marry his mother's brother's daughter. The fieldworker would label this as an example of what type of marriage

Cross-Cousin Marriage

Explanation:

The fieldworker will label that type of marriage as cross-cousin marriage.

Cross-cousin marriage is simply a type of marriage that exists between the offsprings of two opposite-sex brothers and sisters. This could be the child of the person's mother's brother or the person's father's sister.

This type of marriage is sometimes used to bring alliance in place.

answer; /// the answer to the first question is (b) it began when people first deliberately seeds; /// and (d); // it gave people a steady food supple for the first time;

the answer is:

c. economic output