Question

Though the ambassadors to the United Nations represent a broad _______ of opinion on international issues, they all work toward the same goal: the promotion of world peace.

Word Bank:
circumference
contiguous
cyclic
excavate
fete
ire
prodigy
repartee
repertoire
repose
rotunda
spectrum
speculate
specimen
tangible
vigil

Answer 1

The correct answer is Spectrum - Spectrum means range. Just plug in range and it makes sence

Answer 2

Do you have to use words from the back? I feel like none of them fit.

If not, then I'd fill the blank with "range". If yes, then I'd use "spectrum" or "repetoire", though neither of those are a perfect fit.