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all nonrenewable fuels can be traced back to the sun as a primary energy source
the ultimate source of energy for all living organisms is the sun
The Sun.
the sun. Or the sun's radiation.
Yes
The sun is not considered to be a primary consumer. The sun is an energy source that is used by primary consumers.
The primary is the sun
the sun
the sun
The Sun is the primary source of all energy on Earth.
all nonrenewable fuels can be traced back to the sun as a primary energy source
the ultimate source of energy for all living organisms is the sun
sun
The Sun.
the sun. Or the sun's radiation.
the primary source of energy is sun.
Sunlight is Earth's primary source of energy.