Answer:
The correct answer is option 2.
Step-by-step explanation:
Autotroph is an organism which produces their own food from inorganic material such as water, carbon dioxide or from other chemicals.
For example : Green plants , some algae etc
Heterotroph is an organism which cannot manufacture their own food depends upon autotroph for food.This organism obtain its food from plants or from animal matter.
For example : all animals,fungi etc
Invertebrates : organisms with no backbone; insects, squids etc.
vertebrates : organism with back bone ;animals, humans etc
A caterpillar is an exoskeleton (external skeleton) eats leaves of plant and trees before it transforms to cocoon and then butterfly. Cater pillar is an insect with no backbone for which it is considered as invertebrate.
Simply it means that for food caterpillar depends upon plants which is an autotroph.
Hence, cater pillar is a heterotroph and an invertebrate.