Walking along the beach in Hawaii, which type of rock are you most likely to find?

Pumice is the correct answer because it is a type of volcanic rock that is commonly found in areas with volcanic activity, such as Hawaii. The Hawaiian islands were formed by volcanic eruptions, and pumice is created when lava cools quickly and traps gas bubbles within it, resulting in a light, porous rock.

While sandstone, shale, and slate are sedimentary and metamorphic rocks typically formed in different environments, they are less common in an area heavily influenced by active volcanism. Sandstone is formed from compacted sand particles, shale from compacted mud, and slate from metamorphosed shale. These rocks might be present in some coastal areas, but pumice aligns more directly with the geological processes that shape the Hawaiian landscape. Therefore, if you're walking along the beach in Hawaii, pumice is the most likely rock type you would encounter.