What cloud type forms in layers?

Question

stratus

nimbus

cumulus

or

cirrus

Answer 1

Stratus;Those clouds which form in layers are called stratiform clouds which indicates the stability of the atmosphere.

Answer 2

stratus which Are lower level clouds.theres stratus and stratocumlus clouds.stratus looks kind of like fog.and stratocumulus look like someone took cotton balls and ripped them apart in the sky.