The main source of energy for most food chains is

  1. the Sun
  2. the soil
  3. producers
  4. decomposers
Answer

A) the Sun

Sunlight drives photosynthesis. 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