Answer: the concrete oprational stage
Explanation: According to Piaget, this stage goes from approximately 7 yrs old to 11 yrs old and allows the child to overcome their egocentric thinking. This means that they can now understand reversibility of things, for example that a litre of water will be the same independently of the bottle or container; this also allows the child to be able to "put themselves in someone else's position".
This child in particular is now able to understand that her babysitter is also an student due to having acquire this ability.
The three primary reasons are <em>the requirements for Confederate states to reenter the Union; overseeing the rebuilding of a Southern economic infrastructure; the fate of millions of freed slaves.</em> These were the main issues and hot topics of American Civil War during that time.
The affect of deforestation in south Africa would make us have less oxygen in the air and many plants will die due to deforestation and less oxygen and carbon dioxide for energy.
I believe its coal and iron im sry if im wrong