The following data shows the number of water bodies in Bengaluru city from to 2007. Observe the data and answer the questions that follow. 60 50 40 1973 (4 marks) 51 38 30 20 25 10 0 17 1973 1992 2002 2007 Number of water bodies Source: Indian Institute of Science a) Explain the trend in the number of water bodies from 1973 to 2007. b) What could be the possible reason behind this trend? c) Many water bodies in cities like Bengaluru are eutrophied due to algal growth. What causes algae to grow so rapidly in water bodies? d) Explain how eutrophication impacts aquatic animals.
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a 2007
b 2002
c 1902
d 1973
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