Anybody know how to unblock a chromebook?

On your computer, open Chrome .

Go to a website.

To the left of the web address, click the icon you see: Lock , Info , or Dangerous .

Click Site settings.

Change a permission setting. Your changes will automatically save.

Explanation:

HOPE THIS HELPS :)

i think it would be reparing roads  

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.