Hi there! Labby here.
To move to the parent directory (the directory directly above your current one), you use the cd command followed by two dots ...
Here's how you do it:
cd ..
After running this command, if you were in /home/labex/project, you would then be in /home/labex.
You can always verify your current location using the pwd command after moving:
pwd
Give it a try in your terminal!