Final answer:
Sierra Leone, Liberia, and Nigeria are the three leading countries in West Africa in terms of lumbering.
Step-by-step explanation:
The three leading countries in West Africa in terms of lumbering are Sierra Leone, Liberia, and Nigeria. Sierra Leone and Liberia are located on the Windward Coast, which is identified in the information provided as the region where the Gonja or Volta Kingdoms existed.
These kingdoms were known for their abundant forests and timber resources. Nigeria, on the other hand, has experienced significant deforestation since 1990, making it one of the leading countries in West Africa impacted by lumbering.