Sloth - hotstaw.org

Sloth are the slowest mammals, thereby they got this name, which literally means laziness. They are the slowest mammal on this planet, Earth. They blink slowly, chew slowly, and turn their heads slowly too. Their laid-back lifestyle isn’t the only feature that makes them extraordinary. Craig Holdrege, Director of The Nature Institute says, Sloths are so special because they are slow, and slowness is integrated into their whole being – anatomy, physiology, and behaviour within the rain forest environment.
Most of the information was from the below link.

https://www.bbcearth.com/factfiles/animals/mammals/sloth ^{Click here}

The reason sloths are very slow because their metabolism is extremely slow: 40–74% slower than other mammals their size. As a result, a sloth’s digestive system takes an extra long time to digest the food it eats. Further sloths mostly eat leaves, which are low in calories (low in energy) and difficult to break down, this takes also more time and produce low energy. The combination of these two factors generate sloths with very little energy left to do anything else, this makes them super laid-back, sluggish animals with a highly chilled demeanour.