What do the montgomery bus boycott, the united farm workers strike, the american indian movement's occupation of alcatraz island, and the asian americans for equality demonstration against discrimination in the construction industry have in common?

The answer in this question is they are examples of grassroots activism. This all union like the montgomery bus boycott, the American Indian Movement's occupation of Alcatraz Island, the United Farm Workers strike and the Asian Americans for Equality demonstration against discrimination in the construction industry have all in common because they are all examples of grassroots activism.

The mortgage broker.

Explanation:

The mortgage broker is an individual or company that connects the mortgage borrower to the right mortgage lender, which the mortgage borrower can afford their interest rates on mortgage.

The mortgage broker is paid by the mortgage lender for each mortgage borrower they bring that successfully borrows a property.