Geologists use to determine a rock layer's absolute age. (1 point)

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

How would i answer this for an exam?

Most countries in the middle east must import a majority of their a. gasoline b. oil c. food d. water