4.what did forensic anthropologists learn about "grave 15"?

The forensic anthropologists learn that "Grave 15" contained the remains of numerous women and children from the Guatemalan massacre during the height of Guatemala’s civil war. Due to their clothing and jewelry, their ancestry was traced and that they came from Río Negro. The forensic team uses DNA to identify each skeleton and return them to their families.

a metamorphic rock would be formed.