Elephants sleep for just 2 hours a day – the least of any mammal. It's another sleepless night in the savannah. Wild elephants average just 2 hours of sleep a night, making them the lightest-known snoozers of any mammal. Elephants love to play with mud and water. The mud keeps their skin cool. Their big ears also work like fans. The elephants flap these to keep themselves cool. In the elephant herd, the oldest female elephant decides everything Who takes decisions in your family. Therefore, option c is correct.