Define two different forms of marriage.

Monogamy, the union between two individuals, is the most common form of marriage. While monogamy traditionally referred to the union of one man and one woman, there are some countries that recognize same-sex unions. ... Polygyny is the correct term for a marriage between a man and multiple women.

is this an essay or multiple choice

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.