Favourable factors for lumbering in Africa include all the following except

The question is asking to identify the exception among the listed factors that are favorable for lumbering in Africa. The first three options all suggest reasons why lumbering in Africa might be favorable - high demand for tropical timber, presence of many economic trees, and high demand for fuelwood. These factors suggest that there is a market for lumber products, and that there are abundant resources available for harvesting. The last option, "inaccessible equatorial forest," is the exception. This suggests that there are challenges to accessing and harvesting lumber from the equatorial forest, which could make lumbering less favorable in these areas. Factors that could contribute to inaccessibility might include terrain, climate, or other environmental factors. Therefore, the correct answer is "inaccessible equatorial forest," as it is the only factor that does not contribute to favorable conditions for lumbering in Africa.