The core has the largest density, being made of iron and nickel
The mantle has an intermediate density and the crust has the lowest density.
They may be Fault Lines or boundaries of Continental Plates.
Answer:
Brazil is a South-American country that has political independence from the 19th Century.
Explanation:
Brazil was a Portuguese colony until 19th Century when it gained political and economical independence. It is today one of the leading economies in the region that has democratic leadership, that is independent towards every other country. Political independence of the country is the main reason why we can discuss about Brazil as an independent country.
This layer of soil is called the A horizon.
