<span>An eon is a geologically around tens of millions of years. A period is a million year included in an eon which is also made up of several eras. Therefore my answer is a period due to it being a subset of an era which is a subset of an eon.</span>
Answer:
a. plants are preserved as fossils
Explanation:
Through the passing of time, the dead bodies like plants or animals rest in soil, and the cover by different particles, with the time they can be compressed and form a soil layer. If the environment condition changes they get caught in one soil layer. If this process is repeated constantly, so a new soil layer will be formed. So passing the time, different soil layers will have different animals or plants. With the help of isotopes, the scientist can determine the years of each layer.
This process where the sheets might peel off like an onion is called exfoliation.
Rock exfoliation can be described as a process that occurs causing sheets of rocks to be peeled from the surface of a rock. The process is also describes as Onion skin weathering.
Pressure release that happens during erosion could also be responsible for this happening. Curved plates of rocks would be stripped from underneath.
Here is a similar question brainly.com/question/3180365?referrer=searchResults
Based on geographical analysis, the pair of B countries that share a border is "<u>Brazil and Bolivia</u>."
<h3>Where are Brazil and Bolivia?</h3>
Both Brazil and Bolivia are located in South America continent.
Bolivia is located in the west of Brazil.
Brazil is surrounded by countries like Paraguay, Uruguay, Peru, Bolivia, Colombia, Venezuela, among others.
Hence, in this case, it is concluded that the correct answer is option B. Brazil and Bolivia.
Learn more about geographical location here: brainly.com/question/12790602
