What is it called when local governments join together in order to creatively solve issues?
a. conventions
c. special groups
b. regional arrangement
d. commissions

When local governments join together in order to creatively solve issues is called regional arrangement. Option B is correct.

regional arrangements may be characterized as comprising all those arrangements by which states of a specific region regulate their political, economic, or other relations.

Regional arrangement constitutes a voluntary association of sovereign states within a particular area or sharing interests in that area for a joint purpose, which should not be of an offensive nature, with regard to that area.

d) in the state of iowa