Which of the following is the only mammal that can truly fly?

Bats are the only mammals capable of true flight. Unlike other mammals, such as flying squirrels or colugos, which can glide or glide through the air using flaps of skin or membranes, bats have evolved unique adaptations that allow them to sustain powered flight. Their wings are formed from a thin membrane of skin stretched over elongated finger bones, enabling them to maneuver effectively while flying. This anatomical structure is distinct to bats, making them the only mammals that have developed the ability to actively fly rather than just glide. Birds also fly, but they belong to a different class of animals entirely.