Which is an example of a high-risk behavior that increases the likelihood of contracting an sti?

using a public restroom
having multiple sexual partners
sharing a glass of water
holding hands with a partner

Adog begins walking at a speed of 6 kilometers per hour. after 1 hour, the dog is walking at a speed of 4 kilometers per hour. which is this an example of? a. positive acceleration b. negative acceleration c. speed