The correct answer is:
Sedimentary rock
Step-by-step explanation:
Sedimentary rocks are examples of rock that are created by the displacement and succeeding cementation of ore or organic scraps on the floor of oceans or another evidence of water at the Earth's surface.As it is in the form of round pebbles so it is conglomerate that is a coarse-grained clastic sedimentary rock that is comprised of a large fraction of forming to subangular gravel-size clasts, e.g., granules, pebbles.