To know that an organism is a producer in a food web is, you should know that a producer always lies in the bottom of the web and no arrow will be pointed toward it.
What is a producer in a food web?
A producer is a living thing that produce their own food and act as food for other organism. They do not rely on other organism for their food.
Producers are plants in a food chain and food web.
Thus, to determine whether or not an organism is a producer in a food web, keep in mind that a producer is always found at the bottom of the web, with no arrow pointing toward it.
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