Koala is an animal that is four letters long and ends with "oa."
D.O.A.
floating
oa
Well, honey, the animal you're looking for is a goat. It's got four letters and 'OA' smack dab in the middle. Now, don't go goat-getting yourself into trouble trying to find other animals fitting that description!
D.O.A.
The letters OA make the long O sound in goal
Well, isn't that a fun little riddle! The insect you're thinking of is a "roach." Roaches may not be everyone's favorite critter, but they're just trying to find their place in this big, beautiful world. Just like every little bug out there, they have a role to play in the circle of life.
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The insect is a hornet.
DDT
Bug.