Final answer:
The main reason for illegal immigration from Mexico is the desire for better economic opportunities. Many people from southern regions of Mexico are attracted to the US-Mexican border region, which offers potential for work and a better standard of living.
Step-by-step explanation:
The main reason for illegal immigration from Mexico is the desire for better economic opportunities. Many people from southern regions of Mexico are attracted to the US-Mexican border region, which offers potential for work and a better standard of living. When they are unable to find legal work, they may resort to crossing the US border illegally in search of these opportunities.
This immigration is driven by push and pull factors, such as poverty and unemployment in Mexico, as well as the perception that the United States offers greater opportunities for a better life. The United States has been seen as a land of opportunity and has attracted immigrants, both legal and illegal, from Mexico.