Neanderthals were hunter gathers so utilised a wide source of food. Depending on the season would depend on their main diet at the time.
umm food
polar bears main source of food is fish, seabirds and sometimes reindeer
The Cheyenne's main food source is buffalo berry's.
meat
Corn or maize was a primary food source.
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the main source of income in Ontario is clothes and food :P:P:P
main source for food and water
Yes.
carbohydrates
The main source of energy is from the sun.
there is none
Fish