Pumice is a type of extrusive igneous rock.
Answer: Option A
Step-by-step explanation:
Pumice is an extrusive igneous rock that is formed when volcanoes explode and release magma. Most pumice stones are porous and can float on water.These rocks can also become waterlogged because of their porous nature.
It is an amorphous rock. It is formed when magma cools so quickly the rocks are not able to form a crystalline structure. Pumice is used in landscaping and also concrete.