Question

which phrase describes the absolute age of a rock?
does not provide an exact age
is the number of years since it formed
is the age compared to other rocks around it
indicates whether it is younger or older than the rocks above it

Explanation:

Absolute age of a rock is determined using radiometric dating and gives the exact number of years since the rock formed. The first option is incorrect as it does provide an exact age. The third and fourth options describe relative age (comparing to other rocks).

Answer:

is the number of years since it formed