Answer:
There are four layers of the Earth, including Inner Core, Outer Core, mantle, and Crust. Each layer has its characteristics because of its temperature and formation.
The inner core is solid with iron and other metal deposit in it. The outer core is liquid, while the mantle is composed of silicate rocks. The crust is the outer layer of the earth, consist of different types of rocks.
The earth was able to develop a layer structure because of the climatic change it had millions of years ago, where the hardest metal reached to its core.
The answer to this would be A, because they began to spread westward once they decided to head away from the Arctic.
You are more likely to observe in a city than in the countryside:
- Violent crime
- A wider selection of goods and services
- Cultural mix
<h3 /><h3>What constitutes an urban area?</h3>
The development of social structures and institutions, such as industries, buildings, roads and structures for modes of transport. Urbanization is marked by the concentration of people and greater population growth than rural.
Therefore, in the urbanization of cities, there is a focus on social and economic development.
Find out more about urbanization here:
brainly.com/question/574901
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