Which one is odd one out on the basis of respiration:
Amoeba, cockroach, earthworm, euglena

Cockroach is you answer.

Explanation:

They do this by using a very efficient breathing system that uses air filled tubes, called trachea, to deliver oxygen directly to cells. Oxygen flows in as required into the tracheal system through valves on the insect, called spiracles. But, sometimes, they shut their spiracles and stop breathing.

her affection for her parents makes her an especially sympathetic character.