Which of these best explains the difference between the way animals and plants exchange gases with their environment? * 2 points
a)animals use only respiration, while plants use both photosynthesis and respiration.
b) animals use only photosynthesis, while plants use both photosynthesis and respiration.
c)animals use both photosynthesis and respiration, while plants use only respiration.
d) animals use both photosynthesis and respiration, while plants use only photosynthesis.