10. Short answer question IV

Absolute dating determines the specific age of a fossil by measuring the decay of isotopes isomer within the fossil or, more commonly, the rocks associated with it, using radiometric isomerizationradiometric dating.

Carbon, zirconium, leadCarbon, uranium, lead  are the various radioactive elements present in fossils. Absolute dating is used in palaeozoology and anthropology palaeobotany and anthropology  for determining the age of human fossils and manuscripts.