How does respiration affect the atmosphere? A. Respiration processes CO₂ and creates 77% of the oxygen.
B. Respiration produces 77% of the oxygen loss converting it to CO₂.
C. Respiration is caused by decay and bacteria and produces 17% of the CO₂.
D. Respiration adds oxygen and water vapor to the atmosphere.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point