They show that there was an ocean over the plains long ago, and fossils are always used to elaborate on the history of life/how it developed.
Crystallization
Carbonation
Oxidation
Hydrolysis
is about 55 miles at its narrowest point. so around 50 miles would be the answer.
The sedimentary rock cycle. This is when a lot of rocks are being pushed and pressed together.
I think the correct answer from the choices listed above is option B. With regards to environmental changes, they may affect several populations in an ecosystem because it is where living organisms dwell and they try to adjust accordingly to these changes. Hope this answers the question.