Chemical, mechanical, and electrical I do believe !
Okay look at it, it's really easy. 1st ingestion (going in) 2nd digestion (breaking down) 3rd absorption (retaining the nutrients) 4th elimination (using the restroom) :p see the answer is with-in the definition of the words. Hope this helped. <span />
A food web diagram illustrates "<span>A. all feeding relationships in an ecosystem" These diagrams can vary in size, depending on how specific the illustrator wants to be in the description of the food chain.
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