Biology: autotroph vs heterotroph

Tutoring biology, definitions are important. The tutor distinguishes between autotroph and heterotroph.

An autotroph produces its own chemical energy (in the most familiar case, by photosynthesis), while a heterotroph gets its chemical energy from another organism, dead or alive.

Plants are autotrophs, while animals are heterotrophs.

Source:

Ritter, B., Coombs, R.F., Drysdale, Dr. R. B., Gardner, Dr. G. A., Lunn, D. T. (1996). Biology (British Columbia edition). Nelson Canada.