Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Fossils of ocean animals are found at the top of Mt. Everest. Mt. Everest is the highest mountain on Earth. These fossils show that the area was once at the bottom of a sea. The seabed was later uplifted to form the Himalaya mountain range. An example is shown in the Figure below . Answer: fossils
A:
What evidence is there that mt. everest was once at the bottom of a sea?