There is no text or excerpt for reference however, based on the question we can assume that Zara is a creative person.
A creative person is one who comes up with a new way of doing things and as such can be described as a genius. The question gives praise to the ingenuity of Zara in coming up with a makeshift fishing net to catch fish.
Zara is therefore creative because Zara managed to come up with a way to fish that the crew had not had before which caught enough fish for the marooned crew to avoid starvation.
<u>What Roosevelt says is necessary to make these things possible is </u><u>HIGHER TAXES! </u>
This is obvious because, not only does he emphasize this, but high taxes means more government spending money to fund medicare or scientific advancements.
