Both homes and farms tend to be larger.
Do you mean just the surface or the 4 layers of the entire planet?
The four layers of the planet are, as mentioned, the crust, mantle, outer core, and inner core.
As for the surface, there aren't really 4 distinct parts unless you want to break in up into continents, oceans, ice caps, and atmosphere, but I'm just postulating here.
The answer is C: Black Sea and Caspian Sea
Answer:
The modern atmosphere contains abundant oxygen, making it an oxidizing atmosphere. The rise in oxygen is attributed to photosynthesis by cyanobacteria, which are thought to have evolved as early as 3.5 billion years ago.
Explanation: