C. H<span>ow hard a person works to do an activity.
Intensity has to do with effort. If a person works hard than they are intense, if vise versa than they are not intense.</span>
I believe 7% is almost correct because most people can try to quit smoking a year but hardly ever succeed
Drinking milk helps keep the bones strong. Milk contains calcium, which is what is found in bones. The calcium will strengthen the bone to make it less breakable.
Frequency, Intensity, Time, and Type (FITT)
The helper T cell count becomes very low.