Concept:Major timber-producing countries in Africa are those with substantial tropical rainforests.
Explanation:Ghana, Côte d’Ivoire, and Nigeria all have large rainforest areas in West Africa.
These countries export significant quantities of hardwood timber.
Mauritania, however, lies mostly in the Sahara Desert.
Its climate is too dry to support dense forests.
Mauritania is not an important timber-producing country in Africa.
It is the exception among the listed options.
Answer:D. Mauritania.