All of the cognates
formed by changing the English -tion
in Spanish are FEMININE. That means each and every
one of them would be a "la" word. And
when you modify any of these words with an adjective
or any kind of modifier - that word will have
If you talk
_____tion, this would be " ... una
indicación, etc." You have to use
the modifier "una"
because it is the feminine indefinite article.