Answer :
Wolves
If Wolves eat elk, and elk eat blackberries. the Wolves is a secondary consumer in the food chain.
The food chain describes who eats whom in the ecosystem. Every living thing starting from one-celled algae to giant blue whales everyone needs food to survive. Each food chain is a possible pathway that energy and nutrients can follow through the ecosystem.
Every level in a food chain is known as a trophic level. The food chain consists of four major parts, The Sun, Producers, Consumers, Decomposers.
The food chain also explains the feeding pattern or relationship between living organisms.
To know more about The food chain here
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