Specific Adaptations to Imposed Demands 1) Only the muscles trained will adapt and change in response to a given
exercise
2) As adaption occurs, an increase in the stimulus is necessary
3) Exercise stimulus needs to change over time
4) Adaptation will be specific to the demands of the exercise.

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. 

Answer///(b) ; /// it is marked by the sudden on of severe symptoms;