I want to reinstall my UbuntuĀ 14.04.2 (Trusty Tahr), but the option reinstall without loosing data or something like that don't show to me. This is what I get: errase ubuntu 14.04.2 LTS and reinstall
Here a image with the Ubuntu live CD:

Then if I choose something else (in the installations options), I get my partitioning list like like this

but I can't decide what partition to format so I don't know what to do for reinstalling my Ubuntu without losing my installed programs. My /home directories are backuped.