Read the following passages and select the most appropriate options as answers to the questions given below them:Mr Lester R. Brown in his thoughtful book, The Global Economic Prospect, points out that the earth’s principal biological systems are four-fisheries, forests, grasslands and croplands – and they form the foundation of the global economic system. In addition to supplying our food, these four systems provide virtually all the raw materials for industry except minerals and petroleum-derived synthetics. In large areas of the world, human claims on these systems are reaching an unsustainable level, a point where their productivity is being impaired.When this happens, fisheries collapse, forests disappear, grasslands are converted into barren wastelands, and croplands deteriorate. In a protein-conscious and protein- hungry world, over-fishing is common every day. In poor countries, local forests are being decimated in order to procure firewood for cooking. In some places, firewood has become so expensive that “what goes under the pot now costs more than what goes inside it”. Since the tropical forest is, in the words of Dr Myers, “the powerhouse of evolution”, several species of life face extinction as a result of its destruction.1. The earth’s principal biological systems ………………A. supply our food.B. provide all the raw materials for industry.C. provide minerals and petroleum products.D. Both ‘A’ and ‘B’2. ……………….. form the foundation of global economic system.A. Petroleum productsB. Four principal biological systems of the earthC. Protein-rich food productsD. All of these three3. When human claims on the four principal biological systems reach an unsustainable level,………………..A. grasslands are converted into barren wastelands.B. fisheries collapse.C. forests disappear.D. All of these three4. …………………. is the powerhouse of evolution.A. Decimated forestsB. The tropical forestC. Grasslands and croplandsD. Biological systems of the earth