Excess hydrogen ion is eliminated from the body largely by

The bicarbonate buffer system nahco3/h2co3 takes the place of sodium and forms h2co3 then in presence of an enzyme carbonic anhydrase results in co2 and water co2 diffuses in the cell .

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

Covalent bond is the correct answer