The answer is B. Weathering has to occur before the sediments are eroded
A) lipids because they are used to speed up chemical reactions
These fossils are very useful for us because we can use them to date the layers of rock that they are found in. Fossils that can be used in this way are called index fossils, and rock layers with the same index fossils in them can be correlated. Not my answer, link here for full
http://peter-mulroy.squarespace.com/correlating-rock-layers/
Lavándose las manos, Usando una mascarilla, Permanecer en casa
