What trick of trust is a variant on word of mouth, but involves essentially just finding people with influence over many others to spread messages, such as modern social influencers

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; collective security;

answer; the cats meowing will temporarily increase, but then it will decrease;