Read the materials and maps and complete the following questions. Material 1: Material 2: When Xiaoyue traveled in Africa, she saw the following scenery in turn along the way: the lion was on the gras

Read the materials and maps and complete the following questions. Material 1: Material 2: When Xiaoyue traveled in Africa, she saw the following scenery in turn along the way: the lion was on the grassland. (1) According to the second document, Route 1 can reach the tropical desert climate zone from the tropical rain forest climate zone and the tropical grassland climate zone to the north, and the following landscapes can be seen in turn along the way: lions chasing animals on the grassland, elephants swimming leisurely in the rain forest, giraffes eating leaves on trees, and camels walking in the desert;

(2) According to Material 3, Nibi's hometown has dense primitive rainforest, and Area C shown in Figure 1 is a tropical rainforest climate zone; Nigeria "has few crops, mainly relying on selling cocoa to buy food and daily necessities", which shows that its economy is backward and it mainly exports primary products;

(3) As can be seen from Figure 2 in the material 1, C is the longest Nile in the world, D is the Congo River crossed by the equator, and H is Madagascar, the largest island in Africa;

(4) Africa's climate is dominated by savanna and tropical desert, which is called "tropical continent".

So, the answer is: (1) me; (2)c； Mainly exporting primary products, the economy is backward; (3) the Nile; Congo; Madagascar; (4) savanna; Tropical desert; Tropical.