The predictable rate of allows scientists to estimate the age of a rock or fossil by examining its isotope content.

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

Explanation:

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .