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The primary souce is the SUN
the primary food source for the artic fox is the Harp Seal
food
Corn or maize was a primary food source.
PLANKTON
Plankton.
The Sun
This one
Food
It is the sun.
four primary consumers of the sahara desert
food webs contain many food chains however a food chain shows only one primary source and food webs contain more than one primary source.