If you can list 3 different ways that'll be great :) what are the different ways in which a nation can use to regulate the problem of immigration ​

Number one: We must respect the consent of the governed, that is the will of the people. Individuals who are not citizens do not have a right to American citizenship without the consent of the American people.

That consent is expressed through the laws of the United States. Through those laws, we the people invite individuals from other countries, under certain conditions, to join us as residents and fellow citizens.

Number two: We cannot compromise national security and public safety.

Every nation has the right, recognized by both international and domestic law, to secure its borders and ports of entry and control what and who is coming into its country. A disorganized and chaotic immigration system encourages people to go around the law and is a clear invitation to those who wish to take advantage of our openness to harm the nation. Secure borders, especially in a time of terrorist threat, are crucial to American national security.

Number three: Becoming a citizen means becoming an American. We must preserve patriotic assimilation. The founding principles of this nation imply that an individual of any ethnic heritage or racial background can become an American. That’s why we have always welcomed immigrants seeking the promises and opportunities of the American Dream. Patriotic assimilation is the bond that allows America to be a nation of immigrants. Without it, we cease to be a country with a distinct character, becoming instead a hodgepodge of different groups. If we are to be a united nation, living up to our motto of e pluribus unum, out of many, one…we all must understand and embrace a common language, history, and civic culture. And that not only benefits America, but also those immigrants and their families who aspire to prosper here.

The answer would be "so"