Second Law of Thermodynamics. Roughly speaking, to get ANYTHING done, you need to have available energy. All machines, but also all life forms, need energy.The Sun is the ONLY significant source of freely available energy here on Earth. Most other forms of energy (including wind, potential energy from falling water, etc.) derive from solar energy. The few other forms of energy are either not significant, or are difficult to access for living beings.
not really all. but they indirectly get their energy from the sun
the ultimate source of energy for all living organisms is the sun
The Sun.
The sun is not a decomposer. Decomposers are living organisms.
the sun
The sun.
The Sun!!!!!!!!
From what they consume or absorbing heat like from the sun, I think...
The sun.
radiant energy from the sun
The sun
The sun.