Question

One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of

A carbon dioxide
B.
carbon monoxide
Chydrogen
D. nitrogen

Answer 1

A Carbon Dioxide

Step-by-step explanation:

If CO2 is not availabe photosynthesis will not take place.

Hydrogen, Nitrong and CO(carbon monoxide) are not needed at all for photosynthesis