What is the purpose of the geologic time scale?
A. to organize and sequence events by eras and periods in the different divisions of time and to serve as a timeline
B. to show the evolution of life forms and to model how those life forms behaved and what they ate
C. to organize and sequence events in the history of Earth and to serve as a model for a vast amount of time covered
D. to determine the relative ages of rocks and when and how they formed to create a timeline of their development

I believe the best answer here would be A.

Explanation:

The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."