Question

America’s national parks play an important role in preserving our natural environment. _______________, they raise money for their local economies: ten dollars for every dollar of funding. *

Furthermore

As a result

On the contrary

In comparison

Answer 1

Answer: Furthermore

Explanation: If you use 'furthermore', it means that you add a new idea to your sentence. As you see here, they continue sentence by adding something about funding, which is additional to natural environment.