If you erode material off of a region,it would: 
Definitions:
Interacting Group
A collection of individuals who communicate and work with each other directly to achieve common goals.
Identical Skills
Skills or competencies that are exactly the same across two or more individuals.
Independent Roles
Positions or functions in a group or organization where individuals work autonomously, with minimal dependence on others for the completion of tasks.
Functional Team
A group of individuals with specific roles and expertise, working together towards a common business task or objective, typically within the same department or functional area.
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