While the earth’s crust is undergoing constructive changes to create new relief, external forces of nature are working vigorously to level this down. Explain.

1. While the earth’s crust is undergoing constructive changes to create new relief, external forces of nature are working vigorously to level this down. Explain. (10 marks, 150 words)

Reference: Certificate Physical & Human Geography by Goh Cheng Leong.