The correct answer is: b) Interstate migration.
Interstate migration is the movement of people from one state to another. It is a form of internal migration, which is the movement of people within a country. Interstate migration can be caused by a number of factors, including economic opportunities, family reunification, and natural disasters.
In the case of Andhra Pradesh, out-migration of workers to other states in India is a form of interstate migration. This is because the workers are moving from one state to another in search of employment opportunities.
The other options are incorrect because:
- Intrastate migration is the movement of people within a state.
- Forced migration is the movement of people who are forced to leave their homes due to war, persecution, or natural disaster.
- Rural-urban migration is the movement of people from rural areas to urban areas.
I hope this helps! Let me know if you have any other questions.