Answer:
A
Explanation:
because they are kept on certain criteria and boundaries.
Answer:
the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources and political and economic activitie
Explanation:
Answer:
The top of the Grand Canyon is made up of Kaibab Limestone. Which contains marine fossils which indicate that it originated at the bottom of the sea.
Explanation:
The United States remained a largely agricultural nation until late in the 19th century. Unskilled workers fared poorly in the early U.S. economy, receiving as little as half the pay of skilled craftsmen, artisans, and mechanics. About 40 percent of the workers in the cities were low-wage laborers and seamstresses in clothing factories, often living in dismal circumstances. With the rise of factories, children, women, and poor immigrants were commonly employed to run machines.
