Question

Engineers began to stabilize the Leaning Tower of Pisa between 1990 and 2008 AD.

How?
Hundreds of people are holding it up day and night.
It has lots of suspension cords holding it up.
A crane pushed the top of it upright.
Ground was slowly removed from underneath one side of the tower.

Answer 1

Ground was slowly removed from underneath one side of the tower.

Step-by-step explanation:

Steel cables helped pull it back into its original position.