Mammals include the largest animals on the planet, the rorquals and other large whales, as well as some of the most intelligent, such as <answer>elephants</answer>, primates, including humans, and cetaceans. The basic body type is a four-legged land-borne animal, but some mammals are adapted for life at sea, in the air, in trees, or on two legs. The largest group of mammals, the placentals, have a placenta, which enables feeding the fetus during gestation. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 33-meter (108 ft) blue whale.
Which four legged mammal is considered to be the smartest?
elephants