Explanation: Igneous rocks are formed from the solidification of magma or lava. They are classified into two main types based on their formation: intrusive (formed below the Earth's surface) and extrusive (formed above the Earth's surface). The texture and composition of igneous rocks vary depending on the cooling rate and the minerals present.
Granite is a common intrusive igneous rock that is widely used in construction. It is composed primarily of quartz, feldspar, and mica. Granite is known for its durability, hardness, and resistance to weathering, which makes it an excellent material for construction. It is commonly used for flooring, countertops, and building facades due to its aesthetic appeal and long-lasting nature.
Pumice, another igneous rock, is formed from the rapid cooling of lava with high gas content. This results in a highly porous and lightweight rock. While pumice has various uses, such as in abrasive materials and lightweight concrete, its porous nature makes it unsuitable for most construction applications.
Graphite, mentioned in the options, is not an igneous rock but a form of carbon. It is a mineral that is used in various applications, such as in pencils and as a lubricant, but it is not used in construction.
Limestone, also mentioned, is a sedimentary rock composed primarily of calcium carbonate. While it is used in construction, it does not fit the category of igneous rocks.
In summary, granite is the correct answer because it is an igneous rock that is widely used in construction due to its durability, hardness, and aesthetic appeal. Understanding the properties and uses of different rock types is crucial for identifying the appropriate materials for construction and other applications.