What is a sentence with the word tertiary?

As like primary stands for first stage of anything,

secondary stands for second stage of anything ,

tertiary stands for third stage of anything and

quaternary for fourth stage.

add. Another few Words of similar 'three' meaning are tri, ternary, and ternate.

Primary eats the plants

Secondary eats the things that eat the plants

tertiary eats the thing that eats the thing that eats the plants- dose not get eaten.