Final answer:
Armored fish, trilobites, and early horses are examples of animals that lived on Earth before dinosaurs.
Step-by-step explanation:
Animals that lived on Earth before dinosaurs include the armored fish, trilobites, and early horses. Armored fish such as Dunkleosteus were ancient marine creatures that lived around 380 million years ago and had a bony armor covering their bodies for protection. Trilobites were marine arthropods that existed from the Cambrian period to the Permian period, around 540 to 250 million years ago. Early horses, known as eohippus, lived during the Eocene epoch, which was around 56 to 34 million years ago.
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