Final answer:
Some scientists believe Tyrannosaurus rex was a scavenger due to its sense of smell, body structure, and arm characteristics.
Step-by-step explanation:
Some scientists believe Tyrannosaurus rex was a scavenger for several reasons. Fossils indicate that T-rex had a powerful sense of smell, similar to modern scavengers. T-rex also had a large and heavy body, which would have made it difficult for it to run fast enough to catch prey. Additionally, T-rex had short arms with small, non-retractable claws, which would have been ineffective for catching and killing prey.
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