Sloth is worried about climbing higher up the tree.
But she's not a baby.

She's not a bird, either, with wings to fly.
Or a monkey, with a tail to catch her fall.
Or a snake, that can wrap around branches.

The truth is, Sloth could fall, as her friend Moth so helpfully points out. Again. And again. Until a storm proves that Sloth may not be like the other animals, but being herself is exactly what she needs to save the day.