An opinion is based on feelings. It is biased and what you or someone else believes. It may be true or not.
A fact is something strictly proven right or wrong. And is one answer not many.
The correct answer should be additionally.
The word additionally would provide the best transition between these two sentence. It is so because you have one idea in the first sentence, and then you want to show another idea very similar to the first one in the second sentence. Using additionally to convey that is the way to go.
Answer:
I'm not sure what story you are reading but some common tones for objection include: threatening, stern and serious.
