Which event can be categorized as an internal stressor? participating in volunteer activities
experiencing anxiety over uncertainties
having challenges at work or school
being overly busy

The answer would be fracture.

Pe.dometer would be the most useful to you for monitoring heart rate.

Afew buddies come over to your house to hang out. they notice you're struggling in school, perhaps you have to rely on to pass your class, but you can't absorb the knowledge. they could positively reinforce getting a tutor and working with you, dedicating more time to the areas of struggle and less on hanging out to better yourself.secondly, say you're the victim of bullying. you're afraid to tell an adult because of possible repercussions from the bully himself. your friends encouraging you and pushing you towards telling an adult for your safety is another example. 

Wearing a condom or wear protection