What was the reason of the partition of Bengal with evidence?

The Partition of Bengal

Explanation:

The first partition of Bengal in 1905 brought that province to the brink of open rebellion. The British recognized that Bengal, with some 85 million people, was much too large for a single province and determined that it merited reorganization and intelligent division

Once the Partition was completed Curzon pointed out that he thought of the new province as Muslim. Lord Curzon's intention was to divide Bengalis, not Hindus from Muslims. The Western districts formed the other province with Orissa and Bihar. The union of western Bengal with Orissa and Bihar reduced the speakers of the Bengali language to a minority.Muslims led by the Nawab Sallimullah of Dhaka supported the partition and Hindus opposed it.

Explanation:

The Britishers did not want Muslims to rule Bengal...They wanted the Hindus to rule the Bengal and protested against The Muslims..

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it affected it because the kingdoms (with trade) slowly got richer and richer.