Unesco the mostar city council rebuild the mostar bridge. by doing this, it honored its objective of
protecting all heritage sites that have a universal value
encouraging international peace
reshape cultural policies
fostering freedom of expression

UNESCO helped the Mostar city council rebuild the Mostar Bridge. By doing this, it honored its objective of protecting all heritage sites that have a universal value.
Mostar Bridge is an important cultural sight in Bosnia, and rebuilding it is important as part of UNESCO's care for cultural heritage. This has nothing to do with these other options.