Read the topographic map, climate type map, industrial city distribution map and agricultural distribution map of the United States, and answer the questions. (1) The largest industrial and urban agglomeration in the United States.

(1) The largest industrial and urban agglomeration in the United States was first formed and distributed in the northeast region, which is due to its abundant water resources, near the Atlantic Ocean, convenient transportation and rich mineral resources.

(2) As can be seen from the figure, the agriculture in the United States has the characteristics of specialization, and the agricultural belt around the Great Lakes is a dairy belt. The main reason for the layout of this agricultural belt here is that the climate in this region is cold and humid, and the water is abundant, which is conducive to the growth of pasture. The consumer market is vast.

(3) The United States imports a large number of tropical agricultural products because the United States is located in the north temperate zone and lacks tropical climate.

(4) The planting industry in the United States is concentrated in the central region, and the superior natural conditions for developing planting industry in the central region are that the central region is plain, flat terrain and abundant water.

Therefore, the answer is:

(1) Northeast region; There are five great lakes in this area, with abundant water resources, facing the Atlantic Ocean and convenient transportation. The Appalachian Mountains and the Great Lakes basin are rich in coal and iron resources.

(2) specialization; Dairy cattle belt; The climate in this area is cold and humid, and the water is abundant, which is conducive to the growth of pasture. The area is densely populated and has a broad consumer market.

(3) The United States is located in the north temperate zone and lacks tropical climate;

(4) The terrain is flat and the water is abundant.