<u>Answer:</u>
The question <em>¿Qué necesitaba la tía? </em>(What did aunt need?), is made in the spanish verbal tense: past imperfective or imperfect.
Where <em>la tía</em> (the aunt) is the <u>3rd person singular</u> <em>ella</em> (she).
This means the verb <em>necesitar</em> (to need) is translated, according to the subject<em> la tía</em>, to the past imperfective in indicative mode to <em>necesitaba</em> (she needed).
Therefore, the answer is in the same verbal tense:
<h2>La tía <u>necesitaba </u>más flores.
</h2>
The aunt needed more flowers.
The other forms of the verb <em>necesitar</em> do not match with the subject of the sentence because:
<em>- necesitó</em> (she needed), although is with the <u>3rd person singular</u> is in preterite perfect simple
<em>- necesitamos</em> (we need) is in present with the <u>1st person plural</u>
<em>- necesitaron</em> (they needed) is in preterite perfect simple with the <u>3rd person plural</u>