While tarah is learning a list of animals for a memory test, a pet scan shows that the upper part of her left frontal lobe is the most active. she is most likely using encoding?

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?