In heterosexuals, discuss how STIs are passed from to another, and if not passed, explain not.

People who have an STD may be at an increased risk of getting HIV.1-3 One reason is the behaviors that put someone at risk for one infection (not using condoms, multiple partners, anonymous partners) often put them at risk for other infections. Also, because STDs and HIV tend to be linked, when someone gets an STD it suggests they got it from someone who may be at risk for other STDs and HIV. Finally, a sore or inflammation from an STD may allow infection with HIV that would have been stopped by intact skin.

Explanation:

STIs are passed through sexual contact/intercourse and can also be passed through blood and other body fluids. for example aids can be passed through a aids victims blood getting into you're system

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy