The population of bacteria growed rapidly in section B, but stayed the same rate in Section C
:)
Your answer would be C: Arachnids
An area with unifying characteristic is called as a region. The region is a broad geographic area, which is differentiated from other because of the similar features. In a region one or more than one types vegetational climax might be present. It is the continuous and extensive part of the surface. The area in a region is indefinite.
Hence, the given blank can be filled with region.
I think the answer is c because the cooler summers help cool down the earth preventing global warming
D. Lipids would be your answer