"why is that?" she asked. -change this sentence into indirect speech
She questioned why was that
http://www.learnenglish.de/grammar/reportedspeech.htm
Let us know how you rephrase this, and someone here will check your work.
To change the sentence "why is that?" into indirect speech, we need to report the speaker's question instead of quoting it directly. Here's the indirect speech form:
She asked why that was.
In this case, the word "is" changes to "was" because we are reporting the question in the past tense. Additionally, we remove the question mark and the quotation marks because it is no longer a direct quotation.