You are presented with the question "radioactive dating is used to determine the relative age of what?" and the following answer choices: 
- discovery
 - ageless
 - rocks
 - blastoids
 - departation
 - deposition
 - sea urchins
 - bones

Now knowing that radioactive dating is used to determine the age of fossils and for sedimentary rock, fossils provide the relative age of deposition, choose the best answer.


 

      deposition   