Hi there!
The answer is 4) determining the true age of rock layers.
Relative dating is only used to determine the rocks in sequential order from oldest to newest, absolute dating can give an estimated time to the age of the rock.
Hope this helps!
Elephants, who are important grazers, are instrumental in transforming woodlands into grasslands. This has a tremendous impact on other species that depend on the grass for their survival. The significance of the elephant in this example is B. keystone species.
