The diagram shows a man standing under a shelter on a sunny day. given that the man feels hot, which of the following shows the processes of how thermal energy from the sun reaches the man?

a. radiation to conduction to radiation
b. radiation to conduction to convection
c. radiation to convection to radiation
d. radiation to convection to convection

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?