The term used when individual are required to marry outside his/her group is known as ____________

Exogamy

he term used when individual are required to many outside his/her group is exogamy.

Exogamy is the practice of marrying someone outside one's own group, such as one's tribe, clan, or religion. It is the opposite of endogamy, which is the practice of marrying someone within one's own group.

The term "monogamy" refers to the practice of marrying only one person at a time. It is the opposite of "polygamy", which is the practice of marrying more than one person at a time.