During the Civil War, women in the South were left behind to tend to farms and plantations while the men went off to war. They were also forced to deal with significant supply shortages of clothes and food. Many children served in the war as soldiers or drummer boys, and many were left without fathers or with fathers whose ability to earn a living was hampered from injuries sustained in the war. African-Americans in the South were displaced following the war and endured racial discrimination and the same shortage of basic supplies that impacted the entire state.
The main idea of this paragraph is that

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period.the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided.a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs.an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

When we adapt our current understandings to incorporate information we have engaged in?