In winter, this coat is at its thickest and develops air cavities within the hairs, which help to keep the animal warm.
(this coat; is; at its thickest and develops air cavities within the hairs; L:In winter) (the hairs; help; to keep the animal warm) Context(the hairs help,List([73, 94))):(the hairs; help to keep; the animal)
the hairs help,List([73, 94))
this coat the hairs the hairs
is help help to keep
at its thickest and develops air cavities within the hairs L:In winter
to keep the animal warm
the animal