In this context, it seems that they want to see any set of commands that will change (INSERT, UPDATE, DELETE data, etc.) and are not related to the queries that you run to simply return or view the data.
I suspect that more people use these terms interchangeably than you think.
It is a good idea to return to this department without sympathy and ask for clarification, as different teams use different terms. I think you will find that they are asking you to plan ahead any actions to modify the data, to sequentially place your commands in a file (for example, a .sql file if you work in a management studio, etc.) and send this file to them for review.
Asking around was a great move. You cannot be too careful with these things!
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