Certain types of atoms break down at a known rate. a scientist can measure the amounts of broken down products presents in a sample to calculate its age. what technique is this?
a. natural selection
b. speciation
c. radiometric dating
d. the fossil record

The correct answer in the following options is letter C, radiometric dating. It is because with the use of this technique, it enables scientist or researches to determine portions of its isotopes. This will help them measure the sample's age with the use of the portions that has been provided, unlike the natural selection, speciation or the fossil record.

You need to post the picture if you're trying to get this answer

Wikipedia aswell can be used to solve the following questions