Correct option is B
Correct Answer: (b) Sedimentary rocks
Explanation:Sedimentary rocks are formed through the processes of weathering, erosion, transportation, deposition, and lithification of sediments. These sediments are derived from pre-existing rocks that are broken down into smaller particles through natural processes such as rainfall, wind, and chemical dissolution.
Key Facts (Exam-Oriented):
· Sedimentary rocks are formed from weathered materials like sand, clay, and organic matter.
· The processes of erosion, transportation, deposition, and lithification are essential for their formation.
· These rocks often contain fossils, making them important for studying Earth's history.
· They typically form in layers, called strata, and cover about 75% of Earth's surface.
· Common types of sedimentary rocks include clastic (formed from physical fragments), chemical (precipitation of minerals), and organic (formed from biological remains).
· Igneous rocks: Formed from the cooling and solidification of magma or lava, not from weathering or lithification.
· Metamorphic rocks: These are formed when existing rocks are transformed by heat, pressure, or chemical processes, not through sedimentary processes.