Which factors provide the basis for the differences observed in the major land biomes on earth?
a. average temperature and average precipitation
b. average windspeed and average oxygen levels
c. average day length and average night length
d. average organic content and average mineral content in soil

Biomes are most influenced by their latitude, precipitation and their temperature.

A.Average temperature and average precipitation
-yes, this is a very good answer!

B. Average windspeed and average oxygen levels
-no, not as much

C. Average day length and average night length
-no, this has to do with latitute, but does not directly influence biome

D. Average organic content and average mineral content in soil
no, this is rather influenced by precipitation and by temperature, not the other way