Please answer this question

Babies with very low or very high weight are less likely to survive .

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

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?