Which level of consumer has access to the smallest supply of energy?
a) primary
b) secondary
c) tertiary
d) quaternary

Primary consumer depend on  on plants and fungus,Secondary consumers rely on animals and plants ,Tertiary consumers are at the top of supply of energy  because they depend both on primary and secondary consumer.when quaternary get energy supply  most of the energy is lost.
therefore,
the right answer is D) quaternary

The light is great source of energy

Ithink all of these events