Respuesta :
Answer:
The answer should be A
Explanation:
The Carboniferous period was about the time early amphibians showed up, and they were just starting out in the water.
Answer: Amphibians
Explanation:
During the carboniferous period land animals were more diverse because the land areas grew. The four legged tetrapods began to evolve more and more.
During the carboniferous period some reptiles began to have leathery skin on their body. The amphibians usually lived in water not on land during the carboniferous period.
Hence, the correct answer is amphibians.