Answer:
Scientists use the geologic time scale to illustrate the order in which events on Earth have happened. ... They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened.
Answer:
We can use the example of the Greater Accra region, one of the new regions of Ghana.
Explanation:
The Greater Accra region consists essentially of the city of Accra, and its immediate sorroundings, and has over 4 million people.
As the most populated region in the country, its regional economy is the most important for Ghana. It is where a great part of the country's industrial and service sectors are located. The reason for this is geographical: people living close to each other in cities tend to form closer economic ties that increase efficiency and productivity.
The correct answer is - carving terraced farmlands.
The Incas revolutionized the agriculture in South America by starting to use the carved terraces for production. With this technique, the Incas managed to maximize the arable land area, and to perform farming on places where naturally will be impossible. This method is widely used nowadays, and since the amount of arable land is reducing in the lowlands, it is of great benefit for food production in places that are not suitable for building.
