Brent has a son diagnosed with ADHD and believes that this is primarily due to genetics, given that his father had ADHD as well. Brent most likely believes that ADHD is primarily influenced by

buildings

explanation:

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.