Respuesta :

for number 3 the answer is prevent blood from pooling. for number 4 it is all of these. for number 5 it is the first one: complete a self assessment... and number 6 is stressor. for number 2 I was not 100% sure though it would be between oxygen or muscle to bone.
I think these are the answers: 

2. It aids in creating stronger bones.

3. Prevent blood from pooling in the lower extremities.

4. All of these.

5. Complete a self-assessment of where you are at first, and what you want to achieve.
 
6. Stressor. 

Again, these are just guesses. I'm no one to know a lot about this, I just researched somewhat and agreed to the answers I guessed.