What term describes the increase in the average temperature of earths

 C. Militant Native Americans occupied sites such as Alcatraz and Wounded Knee to make their cause known.

Explanation:

Native Americans, during the late 60s and 70s, were revolted with the treatment they received from the government and their poor standards of living. As a result, they emerged as a political force founding the American Indian Movement (AIM) in 1963 in Minneapolis to promote the so-called "red power". To make their cause known they occupied Alcatraz Island in San Francisco Bay in 1969 claiming their right of discovery. In 1973 AIM leaders and around 200 Sioux occupied the tiny village of Wounded Knee in South Dakota, where a Sioux village was massacred in 1890.