What is a cam plant crabgrass pea corn or pineapple?

A CAM (Crassulacean Acid Metabolism) plant is a type of plant that photosynthesizes at night to minimize water loss in arid conditions. Examples of CAM plants include certain succulents and cacti, but not crabgrass, peas, corn, or pineApples. PineApple is a well-known CAM plant, utilizing this adaptation to thrive in dry environments, while crabgrass, peas, and corn primarily use C3 or C4 photosynthesis.