You haven't given us enough information to know for sure but if the Table ribbon items don't appear when you click on it then it isn't a table.

To me, it appears that you are looking at multiple columns if it isn't a table. The ruler shows some varying widths and the positioning of multiple paragraph marks on that 'line'. Go to Layout > Columns > More Columns to examine the settings for that location.

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia