Limestone, the type of rock most likely to contain caves, is made up of: Group of answer choices Rocks erupted from volcanoes. Rocks that solidified deep beneath a volcano. Rocks squeezed and cooked deep in a mountain range. Grains of sand that have weathered out of granite, "glued" together by hard-water deposits. Old shells, or pieces of old shells, pressed together.
Answer: Old shells, or pieces of old shells, pressed together because limestone is made from bones that are parts of the skeleton that got squished together.
