List at least three structures that are shared between ostriches and crocodiles.

Both the Tometti fossil and crocodiles have many pointy teeth while ostriches have no teeth. The Tometti fossil and crocodiles both have long tails with multiple bones, but ostriches only have one bone for their tail. The Tometti fossil shares more structures with crocodiles than it does with ostriches.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.