Answer:
Mesosphere
Explanation:
The mesosphere starts at 31 miles (50 km) and extends to 53 miles (85 km) high. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere, with temperatures averaging about minus 130 degrees F (minus 90 C).
Answer: Mining and quarrying can be very destructive to the environment. They have a direct impact on the countryside by leaving pits and heaps of waste material. The extraction processes can also contaminate air and water with sulfur dioxide and other pollutants, putting wildlife and local populations at risk.
The humanist scholarship encouraged oceanic exploration as due to the large-scale printing of books, people started gaining knowledge and setting out on oceanic expeditions in order to find new trade routes and satisfy their spirit of adventure.
The factors which motivated the Portuguese, particularly Prince Henry the Navigator, to explore west Africa were to extract and export gold and other valuables from which Portugal could benefit. The other reason was that Prince Henry was fascinated about west Africa as the Portuguese had little knowledge about it.
With the development of the printing press, books were available more easily and were even cheaper. This help in the widespread of new ideas and thoughts in society. People built sturdier ships with this knowledge and set out to explore new oceanic routes to procure spices and other goods at cheaper prices from different parts of the world.
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