Urinary system labeling questions! i need on 9,15, and 17

Claustrophobia is an example of a(n)

What is the hormone in your brain that makes you feel happy?

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3