Review the passage:
Day after day, thunderclouds rolled in during the early afternoon. Making
Madison's grass thrive from all the rain. Her neighbors,
however, prayed for a sunny afternoon so that Madison could finally mow
the jungle that was the front yard.
You chose the third part, Her neighbors, however, prayed for a sunny afternoon so that Madison could finally mow the jungle that was the front yard. This part has a main clause: neighbors is the subject; prayed is the verb. A fragment will not have a main clause.