"The viewer wants water."

Translation: A espectadora quer água.

[carosoza]

How can one assume the viewer is only female?

[CriancaGorda]

It is because they provided a captial letter "A" and the they did not provide a capital letter "O". If you wrote "A espectador" that would be wrong because you are mixing the masculine noun with the female article.

[clintonoshea]

But there's nothing wrong with 'o espectador', and yet that is marked as wrong. Another exercise to be reported...

[VaDenys]

I share the disagreement with Carosoza.. looks like a defect