(3)① The latitude of Wenchang Satellite Launch Center is low, and the linear speed of the Earth's rotation is high, which can increase the launch payload.

(2) Being close to the South China Sea is beneficial for large-scale equipment to reach the launch base by sea; Rocket fragments fall into the sea, reducing the probability of injury. (4 points)

Question (1): According to the genetic classification of rocks, basalt belongs to eruptive magmatic rocks. At the bottom of the ocean and at the ridge, it is the growth boundary of the plate. The magma in the asthenosphere below the lithosphere rises to the bottom of the sea, and then cools and solidifies to form basalt. Therefore, question (2) is selected. There are many impact craters of different sizes on the surface of the moon, which are formed by the collision of meteoroids of different sizes in space. Because the moon is small in size and mass, it can't attract the atmosphere. Therefore, there is no atmosphere on the surface of the moon, and meteoroids will not buffer the impact force during the falling of stars, so most of them collide with the surface of the moon and form many impact craters of different sizes. Question (3): Taiyuan is in Shanxi Province. Question (5), conditions for satellite launch: ① Latitude (determining initial launch speed); (2) Weather conditions (determining optical tracking during launch); ③ Terrain. The advantages of launching satellites in Hainan Island are low latitude, surrounded by the ocean, and rocket fragments fall into the sea, which reduces the probability of harm, is safe and reliable, and is conducive to satellite transportation.