Climates changes in Africa​

Much of Africa has already warmed by more than 1 °C since 1901, with an increase in heatwaves and hot days. A reduction in precipitation is likely over North Africa and the south-western parts of South Africa by the end of the century, according to the Intergovernmental Panel on Climate Change

b is the right answer for this question.

7.03-1.70=5.33 and 6.80+5.09=11.89 and 5.5-3.01=2.49