Based on the image, it seems that the picture is of the layers of the atmosphere. Now the B layer is the thermosphere. It is found in between the mesosphere (layer below) and the ionosphere (layer above). It extends up to 600 km high and you can find satellites and the aurora here. Temperature here is higher as the height increases and it is because of this trait, its name thermosphere was based on on. "Thermo," in Greek means heat. It overlaps with the ionosphere.
C.
Biotic mean alive, so we can cut off the first 2 easily. Aquatic birds eat frogs, so that one is safe for now. A decrease in something parasitic usually helps the population, so D is out too. The only one left is C.
The correct answer is A and C.
China's geographic location, with Gobi in the North, and to the West is Himalaya and seas to the east and south, which isolated early chinese civilization from other cultures.
C. China's civilization which is the oldest continuous civilization which i found in the world.
China civilization is the oldest written record in history. In the writings of shang they don't indicate any existence of the Xia.
Sedimentary is b
igneous is a
metamorphic is e
