20: Cactus
Cactus is a type of plant that belongs to the family Cactaceae. They are found primarily in arid and semiarid regions and are renowned for their ability to store water in their thick, fleshy stems. The cactus is famous for its spines, which serve as a defense mechanism against predators. Some of the commonly known types of cacti include barrel cactus, saguaro cactus, and prickly pear cactus. In addition to their unique appearance and practical functions, they are essential in the ecology of their respective environments. Cacti play an essential role in food chains and also serve as nesting sites for many species of birds and insects. Cactus is an extraordinary plant and an essential part of the ecosystem.
