What was one reason immigration from Mexico increased?

Bracero program

Explanation:

In 1942 the United States and Mexico instituted the Bracero program ... The United States began encouraging braceros to cross into Mexico then return illegally to the United States.

Mexican immigration increased as a result of laws restricting Asian immigration.

Explanation:

Legal and illegal migration between the United States and Mexico has been a phenomenon for decades and its roots are primarily economic and social. The 3152 km border between the two states has become the busiest border in the world since the entry into force of NAFTA in 1994.

The migration processes between the two countries date back to the 19th century, but massive immigration began during World War II, when Mexico sent temporary agricultural workers to the US to provide the country with sufficient food needs during the war, as back in the 1900s and 1910s many laws restricting Asian immigration were passed.

The Bracero Program began in 1942 and lasted until 1964. During this time, Mexico provided its neighbor with about 4.5 million seasonal workers, peaking at 450,000 workers per year in the 1950s. Contrary to expectations, the influx has not stopped, but has continued and even intensified over the coming years.