Which biomes have different temperatures but nearly equal amounts of precipitation?

A. Desert and tundra
B. Rain forest and grassland
C. Tundra and savanna
D. Rain forest and tundra

Chalk is an ionic compound. which is a property of all ionic compounds that makes chalkboard? particularly useful for writing on a a high melting point hardness and brittleness inability to dissolve in water a multicolored appearance

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal response by in order to it's core temperature.