a body of people representing the states of the US, who formally cast votes for the election of the president and vice president.
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.
i think it is the third one.