A koala bear is not a plant, so it can't be an autotroph. Koalas consume autotrophs, so they are heterotrophs.
The koala is a marsupial mammal animal and therefore heterotrophic. If it was autotrophic, it would be a plant.
autotroph
A platypus is a heterotroph.
heterotroph
The viper-fish is a heterotroph.
A crocodile would be a heterotroph. Heterotrophs get their food and energy from other sources such as by consuming other animals. Autotrophs make their own food or energy such as through the process of photosynthesis.
Heterotroph
heterotroph
Heterotroph
heterotroph
Heterotroph.
heterotroph
heterotroph.
Heterotroph.