Concept:West African livestock farming is predominantly traditional and relies on natural pasture.
Explanation:Most farmers in West Africa keep livestock under free-range conditions.
Animals are allowed to wander and feed on natural vegetation throughout the year.
This system does not involve controlled paddocks, fencing, or planned rotation.
Because the animals graze continuously on the same land without periodic rest, it is known as continuous grazing.
Rotational grazing requires dividing land into paddocks and moving animals systematically.
Strip grazing involves restricting animals to a small strip of pasture at a time.
Zero grazing means cutting and carrying forage to confined animals.
All these methods demand more management, fencing, and infrastructure.
Such intensive systems are not commonly practised by traditional livestock keepers in West Africa.
Hence, the most widespread system is continuous grazing.
Answer:A. continuous grazing