Question

Which of the following is considered the most important and yet most threatened ecosystem on the planet? coastal wetlands rainforests coastal ranges argentinian pampas 9. why are there so many earthquakes in south america? south america’s incredible biodiversity lends itself to hazardous conditions. south america’s location atop the nazca and south american plates of the circum-pacific belt. south america’s lack of stable infrastructure and good building codes. south america’s proximity to two major oceans and the equator.

Answer 1

Here are the answers of the given questions above.
8. The correct answer would be the second option: RAINFORESTS. The rainforest is considered as the most important, yet the most threatened ecosystem in the planet.
9. The correct answer would be the second option. There are so many earthquakes in South America because South America’s location atop the Nazca and south American plates of the Circum-pacific belt.

Answer 2

The answer is rainforests. The destruction of rainforests can lead to global warming due to the accumulation of carbon dioxide as a greenhouse gas in the atmosphere. This is because rainforests are major carbon sinks because they sequester carbon dioxide from the atmosphere. One of the major rainforests that are facing the threat of human activities is the Amazon and Congo forests.

The answer is south america’s location atop the Nazca and South American plates of the circum-pacific belt. The circum-pacific belt is also known as the ‘ring of fire’ because there is a subduction zone in the region. The Cocos plate is subducting under the Caribbean Plate. This creates friction between the two plates with occasional release of high amounts of energies when a stuck region gets unstuck abruptly. This region accounts for approximately 90% of the world’s earthquakes.