The Swadeshi and Boycott movement began in India as a direct response to

The decision of Lord Curzon to partition Bengal, announced in 1905 and effective from 16 October, led to protests in which Indians boycotted British goods and promoted indigenous industries and national education. The Rowlatt Act belongs to 1919, the Simon Commission to 1927-28, and the Government of India Act, 1935 came much later, so none of them can explain a movement launched in 1905.