Answer:
I would usually use finally but that answer could change depending on the application. Go with your gut and try grammarly if you feel that finally does not work.
I disagree because some people have more opportunities in life than others and, for this reason, they have the chance to accomplish more.
For instance, a child born in a developing country would probably have less chances in his/her life for education and consequently less job opportunities than a child born in the Western world. Also, in the Western world, two people may have different education opportunities because one is raised by a rich family and the other is raised by a poor one.
Sometimes circumstances are unfair and so we shouldn't compare the accomplishments of two people without considering their circumstances.
Answer:
The first quotation advances the plot, the second one reveals the character traits of the speaker, the third quotation creates suspence, and the last one reveals motivation.
Is this a question or are you just trying to make a story?