Which of the following is true about the length of food chains?
A. Food chains can support up to 10 trophic levels.
B. An ecosystem with a high-enough number of species will feature a limitless length of food chain.
C. Energy lost as heat at each trophic level limits the length of food chains.
D. The extinction of a species in a food chain will affect only the species directly preying upon it.
E. Food chains are shorter in stable habitats.
Answer: C
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