Can somone plz i need answer now and running outta time

What is an example of providing positive feedback in communication

What economic effects might result from the depletion of groundwater supplies from the ogallala aquifer? need to know asap

*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