Random Assignment Helps you control for confounding variables
‘unintended cause that systematically changes with IV
Confounding (to mix or to mingle) variable interferes with
your ability to interpret your results

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; attention;

answer; the difference intentions of each photographer;

i do not know the question, but all of the above are correct; ///good luck;