Answer:
Invertebrates
Step-by-step explanation:
Most of the fossils belong to invertebrates. Invertebrates make around 95% of all the animal species. Invertebrates do not have bones that are present in vertebrates. The soft body parts of invertebrates form impressions and their exoskeletons and shells also form fossils. Bones of vertebrates are scattered after the death of the organisms and makes their fossils rare.