"Dobles a la derecha." means "Turn to the right.". So yup. It's in command form. If you see sentence that has "May I" or "Can I" in it it's asking. If a sentence has "Do now" It's commanding.
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Answer
Con el poco texto que nos das podemos deducir que es la contaminación marina.
Champu
Is easy tell me if you Need more help
