A. Harbour seal
B. Polar bear
C. Arctic cod
D. Capelin
参考答案:
C
本题详细解析:
Explanation:
Arctic cod feeds on herbivorous zooplankton which is a primary consumer which makes Arctic cod a secondary consumer. Arctic cod also consumes carnivorous zooplankton which is a secondary consumer, making Arctic cod both a tertiary and secondary consumer.
Harbour seals (Choice A), polar bears (Choice B) and capelins (Choice D) are all tertiary consumers, not secondary consumers.
