Answer:
1. Inter-generational Mobility.
2. Structural Mobility.
3. Exchange Mobility.
Step-by-step explanation:
Three types of Social Mobility are:
 1. Inter-generational Mobility: 
- The fluctuation which family members make in their social class from one generation to another generation.
 
- As a result, one individual effort can make his level rise from one to another level but the failure of an individual can reverse it. 
 
 2. Structural Mobility:
- Social changes that affect a large number of population.
 
- The shift of the economy from factories machines to computers that created a large number of jobs, shift from blue-collar jobs to white-collar jobs.
 
 3. Exchange Mobility:
- The movement of people up and down in the social class system while the balance of proportions remains the same.