God just designed them that way.
Answer:
Only New World monkeys have prehensile tails. Old World monkeys have shorter, non-grasping tails.
Like any adaptation in a species this is due to the evolutionary pressures of living in a specific ecology. New World monkeys have had about 40 million years since they split from the Old World monkeys and have been isolated in an environment different from those distant relatives.
For some reason (unknown) being able to hang on with their tails gave them the advantage that made that genetic change a plus for survival.
Most monkeys do not actually hang from their tails, but some kinds grip onto branches with them. Monkeys use their tails to balance as they are walking and climbing along branches on trees.
there long tails
to keep their balance
that is seamonkey poo
they do have different features. example: some monkeys have tails and some have not.
The family of New world monkeys called Callitricids (which are the marmosets and tamarins) DO NOT have prehensile tails. HOWEVER all of the Cebids DO have prehensile tails. No Old World monkeys have prehensile tails.
Only some species are smaller than average monkeys. Many are significantly larger, especially in the length of their long arms, legs, and tails.
The Monkeys Have No Tails in Zamboanga was created in 1907.
They have Long, Flexible tails, to swing from tree to tree.
Spider monkeys have inredibly long tails.They wrap their tails around the tree, and just hang there.
monkeys have tails apes do not orangutangs are apes so they do not have tails
There are many different species of monkeys, all with different adaptations. Some monkeys have special tails that they use as a fifth limb. Monkeys are flexible, strong, they can reach far, they have camouflage to hide in trees, and also are very fast.