If a piece if DNA breaks off from a chromosone and attaches itself to a nonhomologous chromosome at another location, what type of change has occured?

Mutation (Translocation)

Explanation:

Many at times, changes occur in the genetic material. These changes alter the sequence of the genes in the genome. These changes are called MUTATION. Mutation is any change, whether small or large, in the genetic sequence of a DNA. Mutation is of different types depending on how and it occurs.

When the change occurs in a manner in which chromosomal segment breaks off and is reattached to another different chromosome, it is called TRANSLOCATION MUTATION.

youre right there are

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: