Many succulent species of plants have which type of CO₂ fixation?

The correct answer is: CAM pathway

CAM plants are usually succulents as they are efficient at storing water due to the climates they live in i.e., dry and arid. The leaves of succulent plants are thick, contain moisture, and have a coat of wax to reduce evaporation. During the day, the plants close their stoma to prevent the loss of water and open it at night to absorb the carbon dioxide from the surrounding atmosphere. The carbon dioxide is later converted into malate, which is used in the process of photosynthesis when the daylight returns.