A method devised by succulent desert plants to reduce the problem of photorespiration is A)the C₃ pathway. B)the CAM metabolism. C)the Calvin cycle. D)light reactions. E)nitrogen fixation.

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Succulent desert plants use the CAM (Crassulacean acid metabolism) pathway to reduce photorespiration. CAM plants open their stomata at night to take in CO2 and store it in organic acid molecules. During the day, their stomata remain closed to conserve water but the stored CO2 is released for use in the Calvin cycle. This allows for CO2 fixation to occur without excessive water loss, which is important in arid environments.

A Method Devised by Succulent Desert Plants to Reduce the Problem