Which of the following are the three main types of rocks?

The three main types of rocks are igneous, sedimentary, and metamorphic. This classification is fundamental in geology and reflects the processes by which rocks are formed.

Igneous rocks originate from the cooling and solidification of molten material (magma or lava). Sedimentary rocks are formed from the accumulation and compaction of sediment, which can include minerals, organic material, and fragments of other rocks. Metamorphic rocks arise from the transformation of existing rock types through heat, pressure, and chemical processes, resulting in changes in mineral composition and structure.

The other choices represent different concepts or categories that do not align with the classification of rock types. Options that name specific rocks or terms related to their texture aren’t representative of the broader geological categorization, thus making them incorrect in the context of this question.