The darkness of night motif used in this excerpt creates a sense of a. urgency. b. anxiety. c. romance d. confusion

The dark of night motif used in this excerpt creates a sense of  

urgency.

Explanation:

because the center-south is called the heart of the country

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks