There are some great pictures JJ!
There was a wrong answer on a quiz about a small property and the size of the tree height zone.
Also, I believe in this section of the course the word root (in blue) should actually be branches, to redistribute the weight.
Most trees don’t grow completely straight; a little bit of lean is normal. However, if a tree begins to lean when it didn’t before, this is a sign of a problem. There can be different reasons for this condition, such as poor weight distribution or root damage. Signs of a new lean include soil heaving, or exposed roots on one side. If necessary, move any brush or leaves aside to view the soil around the trunk to see if any roots are exposed. Soil that is so raised that you can see the root sticking out is a sign of advanced uprooting.
As a preventative measure, the homeowner can prune the roots on one side of a tree that is leaning"
Tree Essay (Southwest mountainous area):
There is a tree next to the home that is excessively leaning and it has the potential to cause structural damage if it were to topple. Of greater concern is the tree being a fuel source in case of a wildfire. It is recommended to clear all fuel sources fifteen feet from the perimeter of the home and outbuildings.
Create a fire fuel source free zone around the perimeter of the home. A properly implemented defensible zone greatly reduces wildfire hazards to almost nothing. The forest service has excellent recommendations that are easily implemented. Knowledge and preventative actions will lead to security and peace of mind.