She should ask a trusted adult of they know what happened to it.
Well, the best way to respond to this (for Sandra) would be to tell the boy that she has a crush on him. If he is open about his feelings towards Callie, then him and Sandra can still be friends. If he is not open about them and decides to date Sandra to get closer to Callie, he isn't worth her time. Trust me. Either way, Callie should go out with the guy she likes and all of that good stuff. And, tbh, I have no idea what it has to o with health lol
Answer:
the rate of which your heart should be beating to attain or persue a goal such as exercise to loose weight.
