Answer the following question: Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger.  Having read the above passage, choose the right answer to the following question (choices are deeper or less deep ):   Jonathan is digging at a site, trying to uncover young rocks. In order to find the youngest rocks, Jonathan needs to dig deeper or less deep?
Answer:
less deep