Email address for the last 5 years

[Happyguy2021]

I am asking about the US Visit Visa application DS-160. One of the questions is to provide the email address and they stated that the provided email address will be used for correspondence purposes.

They also ask me "Have you used any other email addresses in the last five years?"
My question is..why would they want to know if I had used other email addresses in the past five years? What is the purpose of that? Since my email address will be for correspondence purposes only?
There would be a problem if I forgot to add another email addresses I used the last five years?

Thanks so much for your help...

[Libra_14]

Its for the background check ... DS160 contains information for your social media account as well.