Question

Scientists can use __________ to determine the age of an igneous rock surrounding a fossil.

Answer 1

I think that they can either use fossils or age of rocks

Answer 2

They can use radiometric dating! (:
Basically radiometric dating isn't one hundred percent trust worthy BUT on the bright side is that they do get a general idea of the ages.
I hope all is well, and you pass! Good luck, rockstar! (: I seriously wish you the best!