The sloth does not grow moss, the moss does.
They cannot grow on a rock but will grow among rocks Moss however will grow quite happily on rocks.
Like any other plants, it requires nutrients and moistness to grow.
moss can grow on a rock
if it is a underwater moss it will or else it will rot.
To grow moss on concrete statues, you can create a moss slurry by blending moss with water and buttermilk, then apply it to the statue. Keep the statue moist and in a shady area to encourage moss growth.
No it does not
by watering it
Yes, dry sphagnum moss can grow if properly rehydrated.
Yes, moss can grow without direct sunlight, as it can thrive in shaded or damp environments.
Yes, there are species of moss that have adapted to life in the desert.
Moss grows anywhere it can. If an indoor surface is clean moss won't grow on it, but outdoors there's no such thing as a clean surface, so moss will grow there if the climatic conditions are right.