1)Passive
2)Active
3)Active
I would say that the parallel list here is C) a lost puppy, a colored poster, and a happy boy.
This is because all words have an article <em>a, </em>and an adjective in front of them, so they are parallel.
If a dog lost a litter of puppies she might foster a litter of kittens because she think they we here litter
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Explanation: