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 refers to the actual number of years that have passed since the rock formed. Relative age (comparing to other rocks, indicating younger/older) is different. Also, absolute age does provide an exact age (through radiometric dating etc.).

Answer:

is the number of years since it formed