Context: Read the passage about sloths and algae.
Sloths spend most of their lives up in trees. Their long claws, shaped like hooks, help them hang on to the branches. Sloths eat and sleep in trees, sometimes hanging upside down.
Sloths don't move a whole lot. Sometimes algae, tiny green plants, grow on their fur. Algae can make sloths look green! This helps sloths hide from other animals in the trees. Algae are also a tasty treat for sloths. A hungry sloth might eat some of its own algae for a snack!
How are sloths able to hang on to trees?
A. Their claws are like hooks.
B. Their fur is sticky.
Determine the correct option from the provided choices and reply with its corresponding letter.

A