As the acid seeps into the limestone, it eats away at the rock and forms caverns and holes underground.
(the acid; seeps; into the limestone) (it; eats away; at the rock and forms caverns and holes underground; T:As the acid seeps into the limestone)
the acid it
seeps eats away
into the limestone
at the rock and forms caverns and holes underground T:As the acid seeps into the limestone