In the United States, there are four main types of immigration that regulate the entry and stay of people in the country. These are:

– Family Immigration: This type of immigration is based on family reunification. U.S. citizens and lawful permanent residents can sponsor their family members to obtain an immigrant visa. This includes spouses, minor children, parents, and siblings, although categories and wait times vary.

– Labor Immigration: Foreign workers can apply for employment-based immigrant visas if they have specific skills and experience. This includes the EB-1 visa for people with extraordinary abilities, the EB-2 visa for workers with advanced degrees or exceptional abilities, and the EB-3 visa for skilled and unskilled workers.

– Refugee Immigration: Refugees fleeing political persecution, violence, or other threats can apply for asylum in the United States. There is also the Refugee Admission Program, which allows certain people to be resettled in the country.

– Humanitarian Immigration: This type of immigration is granted for humanitarian reasons, such as the protection of victims of human trafficking, domestic violence, or abuse, or through the U Visa program for victims of crimes.

It is worth mentioning that the immigration process in the United States can be complicated and time-consuming. Laws and regulations are subject to change, and visa availability may vary. It is crucial that applicants seek legal advice or consult the official website of the United States Citizenship and Immigration Services (USCIS) for up-to-date and accurate information on immigration requirements and procedures.