Question

Examine the two graphs (Figures 3 and 4) which were provided by the Department of Environmental Affairs in South Africa. The graphs show the average temperature increase during the period 1975 to 2010, and related species decline in South Africa. It can be deduced that during the period 1995 to 2005:

• A. an average temperature increase of ${10}^{0}C$ resulted in extinction of 2000 species.
• B. an average temperature increase of $2^{0}C$ resulted in extinction of 3000 species.
• C. an average temperature increase of $5^{0}C$ resulted in extinction of 2000 species.
• D. an average temperature increase of $2^{0}C$ resulted in extinction of 1000 species.

Answer 1

Answer: (D)

an average temperature increase of $2^{0}C$ resulted in extinction of 1000 species.

The graph explains that there is gradual increase in the temperature every year. There is a decline in the number of species with the increase in the temperature. In the year of 1995 till 2000, it is seen that the increase in the temperature by 2${}^o$ C and there is an average decrease of about 1000 species.

Thus, the correct answer is option D.