The article is not required in English when the noun is being used collectively
You're right - the same sentence without "The" at the beginning is now accepted. Anytime you find an error, please report it inside the exercise using the "Report a problem" button.
Thank you for your feedback, and good luck with your studies :)
2019-08-09 I think this sentence is simply devoid of context. For instance, "A palmeira de açaí é amplamente crescida no Brasil. A fruta tem muitos benefícios."