what geologic term or phrase explains why the top of the stratum in a section of rock is the youngest

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

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Plz 98 points so i need 5 paragraphs of a fake article for the threat of pollution in asia i have examples look at those first and i would enjoy if you had word or grammerly and did it on there you very much