The deepest strata of the earth contain fossils that are?

Explanation

The deepest strata of the Earth typically contain fossils that are 'old and simple.' This is explained by the Law of Superposition, which states that in undisturbed sedimentary rock layers, the oldest rocks and fossils are located in the deepest layers. As you move upward through the strata, you encounter progressively younger rocks and fossils. The organisms from the deepest layers are generally simpler, as life on Earth evolved from simple to more complex forms over time. This is why Option D is correct, and the other options are incorrect because they do not accurately describe the characteristics of fossils found in the deepest strata.