Which word means the level of effort required to complete an activity a)recovery b)intensity c)time d)variation

hello the answer is B. intensity It reflects how difficult an exercise is for a certain person to complete and the amount of oxygen the body uses to do an exercise and the amount of calories burned while doing the activity. The higher the intensity, the harder the activity, the higher the heart rate, and the more burned calories hope this helps!!!

i wish it got that cold here ): im in florida and i've never even seen snow, it never feels like a real holiday. i hope you have a good one with your family !