It is more efficient for humans to eat crops than meat because

  1. animals do not respire
  2. meat has no energy
  3. there are fewer trophic levels, so less energy is lost
  4. crops contain more protein
Answer

C) there are fewer trophic levels, so less energy is lost

Each extra level loses energy. O Level Biology · Topic 19 Relationships of Organisms with One Another and with the Environment · 19.1 Energy flow

Biology MCQ · More O Level Biology: Organisms and the Environment MCQs · Practise