They thought that the solar system we live in was the whole universe. So when they referred to the universe, they really meant only our solar system. Galileo did not agree that our universe is geocentric, or that everything revolves around Earth.
There are several reasons experts believe the city of Cahokia disappeared such as:
- It grew too large
- Sanitary system wasn't good and people got sick.
- Inhabitants destroyed the nearby forests to get firewood and without the wood, their city couldn't survive.
- Enemies attacked.
Cahokia was a thriving city that was quite prosperous with their main food being maize which the fair climate allowed them to grow.
Overtime this changed and a drought that lasted for centuries kicked in. It led to conflict and strife in the large settlement as people could not get enough food.
Experts also believe that other problems such as poor sanitation systems and enemies attacking may have also contributed to the inhabitants leaving.
In conclusion, Cahokia was large and thriving but faced many challenges that in the end led to it collapsing.
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Chiang lost support among the
Chinese for a number of reasons including the Inability to Reform, Corruption,
Factionalism and political oppression. This is because his regime became
increasingly preoccupied with maintaining its hold on power, with preserving
the status quo
Based on the fossil, the correct statement is that the The shell evolved after the fern because the oldest fossils are usually at the bottom.
Therefore option D is correct.
<h3>What are Fossils?</h3>
A fossil refers to any preserved remains, impression, or trace of any once-living thing from a past geological age. Some examples of fossils include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants.
There are four main types of fossils, which are all formed in a different way, which are conducive to preserving different types of organisms. They include the following
- Mold fossils
- Cast fossils
- Trace fossils
- True form fossils.
According to the question, the correct statement is that the shell evolved after the fern plant because the oldest fossils are usually at the bottom.
The study of fossils is refers to as Paleontology.
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