Answer:
Option (A)
Explanation:
Fossils are defined as the dead remains of plants and animals that are buried millions of years ago. These fossils are very important as they are good evidences in understanding the evolutionary process that has undergone in the geological history.
The fossils that are found in the deeper undisturbed rock layers are the oldest fossils. These were the simple organisms because of their simple body structures. Whereas, those fossils that are found in the rocks of recent ages are considered to be young fossils. These are well structured and complex organisms. This suggested that the organisms in the past have undergone gradual evolution, that provides a key evidence in determining the evolutionary history.
Hence, the correct answer is option (A).
