Biochemical limestones commonly contain ______.Multiple choice question.seawaterfossilsquartzevaporites

The correct answer is fossils.

Biochemical limestones are primarily composed of carbonate minerals that form from the accumulation of biological debris, particularly the remains of marine organisms. These organisms, such as corals and mollusks, contribute to the limestone's composition through their calcareous shells and structures. Therefore, fossils are a significant component of biochemical limestones, reflecting the biological activity that contributed to their formation. The other options—seawater, quartz, and evaporites—are not characteristic components of biochemical limestones. Seawater is a medium in which the limestone forms, quartz is typically found in other sedimentary rocks, and evaporites are related to the evaporation process, not to the biological accumulation that defines biochemical limestone.