Final answer:
Fossils of tropical fish and palm trees suggest a warm and subtropical environment at the time they were formed.
Step-by-step explanation:
Fossils of tropical fish and palm trees provide information about the environment at the time they were formed. For example, the presence of tropical fish fossils suggests that the environment was warm and had a suitable habitat for these fish. Similarly, the presence of palm tree fossils indicates a subtropical climate. These fossils can be used to reconstruct paleoenvironments and understand the climate conditions of the past.