Energy passes out of a food chain as it moves from one trophic level to the next. In which ways is energy lost from a food chain? 1. by egestion 2. by respiration 3. by photosynthesis 4. by excretion
- A1, 2, 3 and 4
- B1, 2 and 4 only
- C1 and 2 only
- D3 only