Original sentence: General relativity (GR) or general relativity theory (GRT) is a fundamental physical theory of gravitation which corrects and extends Newtonian gravitation, especially at the macroscopic level of stars or planets
Edited sentence: Contrary to what many relativists would say, a geometric approach does not explain the true mechanism of motion, spin (physics) and gravitation.General relativity (GR) or general relativity theory (GRT) is a geometric theory of gravitation which corrects and extends Newtonian gravitation, especially at the macroscopic level of stars or planets.Given that differential geometry deals with abstract metric spaces, the physical mechanism of gravity is incumbent upon physicists to find it.The history of the last 3000 years has taught us that natural phenomena cannot be explained in terms of geometry (see nuclear fusion for example)