Answer:
the correct answer is C
Step-by-step explanation:
It is the correct answer since the variations or the partial pressures of CO2 increase the plants that begin to carry out the photosynthesis processes generating as a product 02, the climatic conditions also condition this process, but it is very specific and not correct to say that it only depends of the sunny day, or of the arid climate, since there are plants that subsist and can say this process in extreme climates, humid or rainy.