Question

what is the largest of all realms on earth

Answer 1

biogeographic realms..............

Answer 2

Explanation:

The four realms of earth consist of Lithosphere, Hydrosphere, Biosphere and Atmosphere. Lithosphere is the outermost layer on the earth and contains all second order landforms. Hydrosphere covers about 71% of the earth’s surface and contains all the first order landforms. Atmosphere saves all living organisms from UV rays of sun. Whereas, Biosphere is the part where living organisms live and is the combination in which all the realms exist together.