Which of the following sentences can be revised to eliminate redundancies?
a. the coast of florida is home to many unique sea creatures like the manatee.
b. the golden gate bridge leads from the san francisco bay to the pacific ocean.
c. nebraska's primary farm products are cattle, hogs, soybeans, and wheat.
d. the tall skyscrapers in new york city maximize the space of a small area.

A redundancy is when you don't get straight to the point.
It's when you provide useless information.
For example:
Redundant- I have to plan ahead for my trip.
If you are planning, it is already ahead, so saying plan ahead is redundant.
Redundant- I have to wake up at 6 am in the morning for an important meeting.
If it's 6 am, it's already the morning so you don't have to say "in the morning" if you say 6 am.
To fix these, you could say "I'm planning for my trip" or "I have to wake up at 6 am for an important meeting."
This one is a bit tricky but I believe the answer is D.
Skyscrapers are already tall, so you don't have to say "The tall skyscrapers."

So I believe the answer is
D. The tall skyscrapers in New York City maximize the space of a small area.

Hope this helps! :)