Concept:Timber-producing countries are those with large forest areas that support commercial logging and lumber exports.Explanation:Gabon, Nigeria, and Cote d'Ivoire have extensive tropical rainforests and are well-known timber producers.Senegal lies mostly in the Sahel and savanna zones, where forest cover is limited.As a result, Senegal does not have a major timber-producing industry.Therefore, the country that is not a timber producer is Senegal.Answer:D. Senegal