Why would smiling make you feel better according to theories about emotion

Astudent is revising the sentence below: i know brendan was upset, but i feel he overreacted. you would have thought he'd just lost his best friend, the way he would bemoan his fate. based on the context of this sentence, which is the best synonym for bemoan? a. complain: express dissatisfaction or annoyance b. grieve: cause distress to someone c. nag: annoy with persistent fault-finding d. provoke: stimulate or incite

Physical needs include: a. the need for sleep b. the need to feel safe c. the need to feel secure d. all of the above

Why is wilhem wundt considered the "father of psychology"?