The biosphere:

ends at the surface of the earth

extends miles below the surface of the earth

includes all the living organisms on the planet

all of the above

The biosphere includes all the living organisms on the planet

Explanation:

The biosphere includes all the living organisms on the planet The biosphere is a global ecological system that forms the layer of the earth where life exists. The layers of earth that form the biosphere are lithosphere (rock), hydrosphere (water) and atmosphere (air) which together known as an ecosystem. Biosphere acts as a self-supporting and self-regulating system were the remaining of the dead plants and animals are released into soil and ocean thus, in turn, it is reabsorbed by plants for growing. The biosphere sometimes is one large ecosystem that is comprised of a complex community of living and nonliving things functioning as a single unit.