Which of the following measurements show how difficult an exercise is?

-intensity
-duration
-resting heart rate
-maximum heart rate

Intensity like they said ^ is correct :-)

The penis goes in the vagina kid, the 31 year old girlfriend must be your mom asking you are you ready to go to bed.

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.