(1) A: Monsoon paddy field agriculture; characteristics: large amount of water conservancy projects, small farmer operation, high yield, low commodity rate, low level of mechanization, and low level of science and technology. (3 points)
B: Commercial grain agriculture; characteristics: high level of mechanization and high commodity rate (3 points)
(2) Wheat and corn (2 points)
(3) Tropical monsoon climate, subtropical monsoon climate, temperate continental climate (3 points)
(4) Rain and heat occur at the same time, the terrain is flat and open, and the population is densely populated. (3 points)
This question examines the types of agricultural regions in the world. (1) The agricultural area type of Jiatu is mainly distributed in East Asia, Southeast Asia, and the coast of South Asia, so it is judged to be Asian rice cultivation. B is distributed in the northern part of the Central Plains of the United States and is a commercial grain agriculture. Agricultural production characteristics: mainly analyzed from the aspects of production scale, commodity rate, mechanization level, scientific and technological level, etc. (2) In picture B, c is located in the wheat belt; d is located in the corn belt. (3) Based on the geographical location of the three regions: a is located on the coast of India, with a tropical monsoon climate; b is located on the southeast coast of my country, with a subtropical monsoon climate; d is located in the central United States, with a temperate continental climate; (4) b is located on the southeast coast of my country. For the rice planting industry, the location factors formed are analyzed from the aspects of natural conditions: climate, terrain, soil, water sources and socio-economic conditions: market, transportation, science and technology, policy, labor force, agricultural foundation, etc. (note that location factors without advantages are not analyzed).