Question

a rock layers ______ age is its age compared to the ages of other rock layers.
a absolute
b relative
c temporary
d apparent

Explanation:

The question describes rock age comparison to other layers. Relative age dating in geology determines if a rock is older or younger than adjacent layers, which matches the definition here. Absolute age uses numerical dates, temporary implies short-term, and apparent refers to superficial appearance—none fit the comparison context.

Answer:

b. relative