Concept:Coal and mineral oil are organic fuels that form and remain trapped in sedimentary layers.
Explanation:Coal originates from compressed plant remains buried under sedimentary deposits.
Mineral oil, or petroleum, forms from decomposed marine organisms trapped in sedimentary strata.
Both require the pressure and heat found in sedimentary basins.
Crystalline, igneous, and metamorphic rocks do not contain such organic deposits.
Therefore, coal and mineral oil are found embedded in sedimentary rocks.
Answer:D. sedimentary rocks