Answer:
The correct answer is D. Desertification can happen as a result of non-sustainable agriculture.
Explanation:
Desertification is a process of ecological degradation in which the fertile and productive soil loses all or part of the production potential. This happens as a result of deforestation and destruction of the vegetation cover, the subsequent erosion of the soils, the overexploitation of aquifers, the over-irrigation and consequent salinization of the lands or the lack of water; human beings frequently favor and increase this process as a result of activities such as excessive cultivation and grazing or deforestation. According to data from the United Nations Environment Program (UNEP), 35% of the surface area of continents can be considered as desert areas, within these territories millions of people survive in conditions of persistent drought and food shortages. Among many other factors, it is considered that the expansion of these deserts is due to human actions.
Answer:
Yes, the climate on the Indian side of the Himalayas is different from that on the Tibetan side.
Explanation:
That's because Tibet is on the rain shadow side of the Himalayas.
When the warm air from India hits the mountains, it must rise over them.
As the air rises, it expands and cools. As it cools, its water vapour condenses to form clouds that precipitate as rain and snow.
The rain is responsible for the monsoons of India.
The Himalayas are at a latitude of about 30° N, so the climate at the foothills is humid subtropical. At higher altitudes, there is permanent snow and ice.
Answer:
Genetic drift
Explanation:
Based on the information given here, the observed genetic variation is most likely an example of Genetic drift .
Genetic drift is the variation in the relative frequency of different genotypes in a small population, owing to the change disappearance of particular group of genes as individuals die out do not reproduce.
The above mentioned information indicate a typical example of Genetic drift