Two earth scientists are exploring a cave. while moving through the cave, they notice that the caves have smooth limestone walls
and that a creek runs through it.
what do their observations tell you about the cave's formation?
a. the cave was formed by deposition of sediments.
b.
the cave produces water from its rock walls.
c.
the cave once was located on the surface of the land.
d. the cave was formed by water wearing away rock.