Read the passage:
'The Chad Basin, an endorheic drainage basin spanning parts of Nigeria, Chad, Niger, and Cameroon, has experienced catastrophic environmental degradation over recent decades. Lake Chad, which once sustained millions through productive fisheries and recession agriculture, has shrunk by nearly ninety percent since the 1960s due to prolonged droughts and diversion of feeder rivers like the Chari and Logone. This shrinkage has catalyzed acute resource competition, displacing pastoralist communities and exacerbating regional insecurity in northeastern Nigeria.'
What is an 'endorheic drainage basin' as used in geographical terminology?
Answer and explanation
Correct answer: B. a closed hydrological basin that does not drain into an ocean or sea
- Step 1: 'Endorheic' refers to internal drainage: rivers flow into inland lakes or swamps with no outlet to the sea, losing water only through evaporation and seepage. Answer: a closed hydrological basin that does not drain into an ocean or sea. Why not the others: It does not mean subterranean limestone caverns, tidal estuaries, or man-made canals.
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