Answer 10-17 will give and award brainliest!

10. I believe it’s A, or the FIT principle
11. Intensity best describes a heavier workload
12. Length, because your enlongating the time
13. D, just look up the definition of frequency
14. B, again look up the definition of progression
15. B, if you start hard all at once you will injure yourself so a progression is the best way
16. B. All the other options have unrelated muscles and exercises
17. B, would be the only way to improve in fitness

Hope I helped :) these were pretty basic, most were only vocabulary based