The images below represent four populations in a food chain.
Which sequence best represents the transfer of energy between these organisms?
a
Toads → Predatory insects → Herbivorous insects → Plants
b
Predatory insects → Herbivorous insects → Plants → Toads
c
Plants → Herbivorous insects → Toads → Predatory insects
d
Plants → Herbivorous insects → Predatory insects → Toads
c
Plants → Herbivorous insects → Toads → Predatory insects