According to the lecture, international politics caused many Puerto Ricans and Cubans to move to the U.S. in the 1950s and 1960s. The correct option among all the options given in the question is option "c. At first, just a few Puerto Ricans migrated to the United States of America. Later on the flow of the immigrants increased.
D. Science Fiction...............
The correct answer is letter A
Explanation: The higher temperature of the earth warms the air above it, making the atmospheric pressure lower than the ocean and blowing the wind to the earth. At night, the situation is reversed: the sea takes time to cool because the deep waters keep the nighttime temperature almost equal to the daytime
