Formed in the atmosphere when chemicals, called volatile organic compounds (vocs), and nitrogen dioxide (no2) are acted upon by sunlight.

smog
sulfur dioxide
ozone

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.