Chaxiang talk about it.

(1)(4 points) Topographic features and judgment reasons: the middle part is high, the periphery is low, and the river is radial.

(2)(4) The reasons for the climate characteristics of tropical rain forests are trade winds (from the Atlantic Ocean)+windward slopes+warm currents (Gulf Stream).

(3)(2) Gemstone genesis: internal force (crustal movement, magmatic activity, etc. ) and external forces (weathering, erosion, handling, accumulation and solid rock formations, etc. )

(4)(4 points) Countries that export the most tea, please analyze the reasons. It belongs to tropical monsoon climate, with sufficient water and heat, suitable for the growth of tea trees, and the growth period and picking period of tea trees are long. The mountainous terrain and acidic soil of this island country are suitable for the growth of tea trees. China's small population and eating habits make tea limited in the domestic market. D an island country with convenient international transportation.

(1) From the analysis of river flow direction, it is a radial water system with high terrain in the middle and low terrain around. (2) The climate that is not at the equator but forms a tropical rain forest is analyzed from the aspects of trade winds, warm currents and windward slopes. (3) This topic examines the geological process from two aspects: internal force and external force. (4) From the aspects of topography and climate, this area is suitable for tea growth, and from the eating habits of the domestic population, the tea market is abroad.