Final answer:
Gandhi's movement of nonviolent, non-cooperation was rooted in his adoption and advocacy of civil disobedience and nonviolence.
Step-by-step explanation:
The root of Gandhi's movement of nonviolent, non-cooperation was his adoption and advocacy of civil disobedience and nonviolence as a means to achieve social goals. Gandhi believed in the power of nonviolent resistance and encouraged boycotts of British goods, such as the Non-Cooperation Movement which called for a boycott of British textiles in India. He also led the famous Salt March protest against the British salt monopoly, highlighting the futility of British control in India.