Red scare group targeted

Explanation:

The First Red Scare's immediate cause was the increase in subversive actions of foreign and leftist elements in the United States, especially militant followers of Luigi Galleani, and in the attempts of the U.S. government to quell protest and gain favorable public views of America's entering World War I.

answer; the federal reserve system;

answereruption of molten material; magnetic stripes in the rock of the ocean floor; the age of the rocks themselves;