Sphere interactions are driven by two sources of energy. The EXTERNAL source of energy comes from what?

From the Sun

Explanation:

Solar power is energy turned by the sun into thermal or electricity. The cleanest and most generous source of usable green energy is solar energy.

Solar energy, Solar radiation capable of heat creation, chemical reactions or power generation. The cumulative number of solar energy events on earth significantly exceeds existing and planned energy needs worldwide.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.