"Throughout the years, numerous organizations offered aid to immigrants at Ellis Island."
that is the best one from the sentences you provided, hope it helps
What it means is that he wouldn't have been able to get where he got if it hadn't been for the scientific achievements of his predecessors. If it hadn't been for these "giants" that enabled him to see so far, he wouldn't have been able to make all the discoveries that he did. For those coming after him, he was a giant that enabled them, and so laws and theories and scientific knowledge always increases based on the knowledge before it.
You still help then if you have most done
Answer:
Because she wants readers to understand the story better at a different pov
Explanation: