Question

what caused the decline of surat and hampi

Answer 1

The Humpi city which was a hub of various activities during the fifteenth and sixteenth centuries fell into ruin following the defeat of Vijayanagara in 1565. They were defeated by the Deccan Sultans (the rulers of Golconda, Ahmadnagar, Berar, Bidar and Bijapur).

Surat declined because of Loss of markets and productivity because of the decline of the Mughal Empire.Control of the sea routes by the Portuguese.Competition from Bombay (Mumbai of the present times) where the East India Company shifted its headquarters in 1668.
hope this helps mate

Answer 2

Surat and Hampi decline was caused by several factors which made the operation difficult hence its decline

The factors which caused its decline included

Lack of enough fund.

Incompetent leadership

Lack of unity

Ideological differences which resulted into the wrangles and hence the decline