The correct answer is option 1: Hindu-Muslim divide. The Azamgarh Proclamation of August 25, 1857 emphasized on the issue of Hindu-Muslim divide.

Option 2, support to the English Government, is not the correct answer because the proclamation did not express support for the English Government.

Option 3, the return of the Badshahi (referring to the rule of the last Mughal emperor Bahadur Shah II), is not the correct answer because the proclamation did not specifically mention the return of Bahadur Shah II or the restoration of Mughal rule.

Option 4, the imposition of heavy Jumas (revenue demand), is not the correct answer because the proclamation did not focus on the imposition of heavy revenue demands.

Therefore, the correct answer is option 1, as the Azamgarh Proclamation emphasized on the issue of Hindu-Muslim divide. This indicates that the proclamation aimed to unite Hindus and Muslims against the British rule during the revolt of 1857.