With dating, a rock's exact age can be determined, whereas with dating, a rock's age is compared to the ages of other rocks.
a. absolute, relative
c. true, absolute
b. relative, absolute
d. relative, approximate

The correct answer is - a. absolute, relative.

The absolute dating is performed over a rock in order to determine its exact age. The relative dating is performed in order for the rock to be compered with the ages of the other rocks.

So, the absolute dating is exact, while the relative dating is only comparable one.

The reason why these types of dating are performed is in order to better understand the geological past of the Earth, the rocks themselves, the fossils found in them, as well as for indication of geological period.

seismic wave -

an elastic wave in the earth produced by an earthquake or other means.

explanation:

all fossil fuels are nonrenewable, so think coal, gasoline, things that we will eventually run out of. all fossil fuels are nonrenewable resources, but not all nonrenewable recourses are fossil fuels. these resources are not being renewed as fast as we are using them. i hope this considering there weren't any answer choices.