6. What are called the remains of living organism used in understanding the history of life on earth? A. bone B. fossils C. seeds D. shells Answer: B. fossilsHere's why:Fossils, the preserved remains or traces of ancient living things, provide crucial evidence for understanding Earth's history of life. These remains can include bones, shells, imprints, or even preserved soft tissues. The study of fossils, paleontology, helps scientists reconstruct past ecosystems and track evolutionary changes over vast timescales.