Read the passage carefully and answer the questions:

With political and commercial realignments, old towns went into decline and new towns developed. The gradual erosion of the Mughal power led to the demise of the towns associated with their rule.  The Mughal capitals, Delhi and Agra lost their political authority. The growth of the new regional powers was reflected in the increasing importance of the regional capitals- Lucknow, Hyderabad, Seringapatnam, Poona, Nagpur, Baroda and Tanjore. Traders, administrators, artisans and others migrated from the old Mughal centres to these capitals in search of work and patronage. Continuous warfare between the new kingdoms meant that mercenaries too found ready employment there.

Assertion: Traders, administrators, artisans and others migrated from the old Mughal centres to the new regional capitals in the 18th century.
Reason: They migrated to these capitals in search of work and patronage.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

With political and commercial realignments, old towns went into decline and new towns developed. The gradual erosion of the Mughal power led to the demise of the towns associated with their rule.  The Mughal capitals, Delhi and Agra lost their political authority. The growth of the new regional powers was reflected in the increasing importance of the regional capitals- Lucknow, Hyderabad, Seringapatnam, Poona, Nagpur, Baroda and Tanjore. Traders, administrators, artisans and others migrated from the old Mughal centres to these capitals in search of work and patronage. Continuous warfare between the new kingdoms meant that mercenaries too found ready employment there.