Answer:
Reintroduction in this context is trying to formally remind people about a particular knowledge.
Cats make good house pets. It's the main idea in the sentence, and it's independent also. The other clause is dependent, so it is not the main clause.
Your answer would be “The most memorable trip was when my brother and I encountered a bear.”
Answer:
The cake or brownies ARE on the counter.
Explanation:
I believe that this is what you are trying to fix, but if not I don't know what the question is.