What is the most prevalent land use in thailand

 the most prevalent land use in Thailand would be for an Agricultural product such as Rice.
By the end of 2016, Thailand makes up about 21.9 % of total Rice export in the world (only second to China which is at 26.7 %).
But Relative to the size of its land, we could say that Thailand is the largest rice exporter in the world.

The correct answer should be brand c.