Which of the following describes a cactus?

A cactus is best described as a succulent commonly found in arid regions. This refers to the unique adaptations that cacti have developed to survive in environments characterized by low water availability. Cacti possess thick, fleshy tissues that store water, allowing them to endure prolonged periods of drought. Their specialized structures, such as spines, serve to reduce water loss and protect the plant from herbivores.

These plants are often characterized by their ability to photosynthesize using a process called CAM (Crassulacean Acid Metabolism), which helps them minimize water loss during the hottest parts of the day. Additionally, cacti have adapted to thrive in sandy or rocky soils, often in regions with high temperatures and intense sunlight. This combination of features distinctly sets cacti apart from plants in wetland areas, temperate forests, or those that grow as creeping vines.