Harry Harlow completed a number of studies in which baby rhesus monkeys were raised with two artificial mothers. One of the mothers was made of wire and delivered food, while the other was made of cloth and provided no food. Harlow was interested in which of the mothers the infant monkeys would seek out when they were startled or frightened. In these studies the dependent variable was:

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.

answer; /// the above statement is (true);