Final answer:
Limestone can be found on top of a mountain because it is a sedimentary rock that can be uplifted during tectonic movements.
Step-by-step explanation:
Limestone can be found on top of a mountain because it is a sedimentary rock that can be uplifted during tectonic movements (Option A). Sedimentary rocks, including limestone, are formed from the deposition of particles carried in air or water and by the precipitation of chemicals dissolved in water. These particles and chemicals come from the weathering and erosion of rocks on the Earth's surface.