The magnetic forces and the gravitational pull from the earth on its axis.
The 
would enable a woman to assess a man's level of commitment, detect the existence of prior commitments to other women or children, and simultaneously signal to the man her sexual fidelity.
Answer:
ASTRONOMY, MATHEMATICS, MEDICINE, TOOLS, AGRICULTURE, NAVIGATION
Explanation:
heres a link to more information
https://www.asbmb.org/asbmbtoday/asbmbtoday_article.aspx?id=32437
The period of US history from the 1890s to the 1920s is usually referred to as the Progressive Era, an era of intense social and political reform aimed at making progress toward a better society.
Progressive Era reformers sought to harness the power of the federal government to eliminate unethical and unfair business practices, reduce corruption, and counteract the negative social effects of industrialization.
During the Progressive Era, protections for workers and consumers were strengthened, and women finally achieved the right to vote.
