<span>The progressives in the United States enacted federal income tax in 1913 after it being rejected in the 1890s by offering an idea that had a constitutional amendment that was also ratified by the states in 1913. They won the ratification of the 16th Amendment to the Constitution in 1913.</span>
The Aztecs have evolved and developed together with their technology. They had agricultural breakthroughs such as irrigation and cultivation of crops such as maize. The spread of this cultivation supported economic development and social diversification. This led American Indians to develop agriculture and provide a stable food supply promoting growth of population. The increase in population fostered more advanced civilizations and American Indian settlement into North America.
Answer:
bones act as lever arms
joints act as pivots
muscles provide the effort forces to move loads
load forces are often the weights of the body parts that are moved or forces needed to lift, push or pull things outside our bodies.
Explanation:
First class lever - the fulcrum is in the middle of the effort and the load. ... Second class lever - the load is in the middle between the fulcrum and the effort. Second class lever This type of lever is found in the ankle area. ... Third class lever - the effort is in the middle between the fulcrum and the load.
Answer:
migration; diffusion
Explanation:
With the migration of people from fertile areas, knowledge of agriculture spread by diffusion.
C.global economy
Global economy is the best choice because it says "each country's economy links to other countries economies"
