Question on choosing same item in dropdown list based on what user choose in other dropdown list

I have two same droplist in two different websites. If a user choose an item in droplist, RPA will automatically choose the same item in other droplist.
I tried to used selected item but return an error message.
How can I do that?

p20 p21

goto edit selecter option in select item activity and use UiExplorer to select ‘SELECT’ tag from html tree.


Where can I find the select tag?