Final answer:
To support the hypothesis of Iceland spreading apart at a divergent boundary, you can label the youngest rock regions as Y, the middle-aged regions as M, and the oldest regions as O.
Step-by-step explanation:
The relative ages of the rock regions on the map can be determined by using the geologic age colors.To support the hypothesis of Iceland spreading apart at a divergent boundary, you can label the youngest rock regions as Y, the middle-aged regions as M, and the oldest regions as O. Geologists use color to represent different geologic time periods.
For example, yellow may represent the Quaternary period, green may represent the Cretaceous period, and so on. In order to support the hypothesis that Iceland is spreading apart at a divergent boundary, you can label the youngest rock regions as Y, the middle-aged regions as M, and the oldest regions as O. Each label should be placed in the corresponding box on the map.