Available choices: 1. diamonds. 2. harm. 3. vegetable oil. 4. soil. 5. coal. 6. oil. 7. lake. 8. bogs.
Q: Fact 1: Oil is formed by layers of sediment pushing down on decomposing algae. Fact 2: When the algae dies it is decomposed by bacteria. Given the two facts above, what do the actions of sediment and bacteria create?
A:
6.