Am I really having to ask you again for the source of this question?
Is there a difference in meaning in both possibilities?
Let me ask you, what is the difference between:Yes, of course. Different tenses have different meaning.
In this question, a) produces a past simple clause whereas b) produces a past continuous one. Perhaps you could ask those relatives on whose behalf you're asking this question what they already know about the meaning and uses of these tenses. Alternatively, you tell us what you think, and we'll tell you if you're right.
In (1), your father started and finished taking the photo while you were eating. Sentence (2) focuses on the middle of the act.Let me ask you, what is the difference between:
1-When my father took this photo, I was eating.
2-When my father was taking this photo, I was eating.
Let me ask you, what is the difference between:
1-When my father took this photo, I was eating.
2-When my father was taking this photo, I was eating.