question_answer 18)

  In a food chain, the third trophic level is always occupied by (a) carnivores                    (b) herbivores                   (c) decomposers              (d) producers

Answer:

                  (a) In a food chain, the third trophic level is always occupied by carnivores that feed on herbivores. The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels. Plants (producers or autotrophs) occupy the first trophic level, herbivores constitute the second trophic level, carnivores constitute the third trophic level and higher carnivores occupy the fourth trophic level.