Hello,
Thanks for your effort, Caty!
   - Solution1: I think in order to see the tree, there are required a
   minimum number of clicks and this solution clearly doesn’t cover this
   condition
   - Solution2: it seems a bit hidden, IMO and also too many clicks, as Sol1
   - Solution3: is a very good idea, but is not sufficient and also a bit
   hidden
   - Solution4: is too crowded, IMO a breadcrumb should be as simpler as it
   can be
   - Solution5: this is the best solution from my point of view, because it
   also preserves the old breadcrumb and it adds a new element, with a “home”
   icon which I think is intuitive enough
   - Solution6: same as Sol3 - really nice to have, but not sufficient
As a conclusion, my choice will be a combination between 3 and 5, or 5 and
6.
Thanks,
Gabriela