(a) Lake Victoria
(b) Lake Faguibine
(c) Lake Oguta
(d) Lake Volta
Answer: (b)
Option (b) is correct:
The Lake Faguibine System, four interlinked lakes 80 km west of Timbuktu, was historically one of Mali’s most fertile areas. But over seven years, droughts in the 1970s dried up the lakes. Then sand filled the channels connecting the lakes to the River Niger, with the result that when rain finally returned the water could no longer reach the lakes. The region’s prosperity evaporated along with the water. In the past, during prolonged rainfall in the Fouta Djallon highlands in Guinea, the river flooded and forced water to flow through two channels into the lake.

