Question

4 fish and trilobites lived at the same time fish created trilobites 3. a canyon wall shows four layers of rock. the top layer has bird fossils, the second has mammal fossils, the third has reptile fossils, and the bottom has amphibian fossils. which group lived most recently? amphibians reptiles mammals birds

Explanation:

In geology and paleontology, the principle of superposition states that in undisturbed rock layers, the youngest (most recently formed) layers are at the top, and older layers are below. Fossils in the top layer are the most recently living organisms.

Answer:

D. Birds