Because wujek is an animate noun, and in the accusative case animate nouns behave as if they were in the genitive case, including adjectives and possessive pronouns. So you have to put the genitive ending to waszego.
Is that all animate nouns or just masculine? Thanks for the answer by the way.
It's still considered animate. It's the noun kurczak which is grammatically animate.
Can Odwiedzacie be used for visiting places? Or is there a distinction between people and places as in French visiter vs. rendre visite à qqn?
Is this asking if you visit regularly, or are visiting or about to visit right now? Is this transitive or intransitive?
Is odwiedzacie "plural you" and waszego "singular you"? I imagine a few people visiting the uncle of one of them, otherwise it would be twojego, right?
"odwiedzacie" is plural you. So is "waszego".
But "Odwiedzacie twojego wujka" would make sense, true. You are probably talking to one person (Adam) about visiting his uncle, but the people that are going to visit his uncle are both Adam and Sue. In that way, sure, it's perfectly fine.
i am confused with this sentence, other than question mark where is the sentence question word? or is it simple a raised innotation
It’s simply a raised intonation. You could add "Czy" at the beginning but it’s not mandatory.