It's called a *Prepositional Phrase.
I can explain further, if you like.
Answer:the correct verb is appears, the subjects are pigeons and building or science building
Explanation:Why I chose appears is because it makes more sense I don’t really know how to explain it. Why didn’t say several large pigeons together is because several large aren’t really subjects, they’re more like adjectives;describing. I don’t really know about the science building because well it might not be a subject because the pigeons are the main ones and I don’t know if it’s science building or just building because science basically tells what the building is. Hope that helps you.
Superlative is the most difficult, but imperative maybe some what difficult
Answer:
first one just completed the same thing the other day
Explanation:
