Answer: Concrete Operational Stage
Explanation:
Conservation is the concept of things staying the same even though other elements change, and this becomes apparent when a child is anywhere from 7-11 years old which puts them in the concrete operational stage.
On April 9, 1865, General Robert E. Lee surrendered his Confederate troops to the Union's Ulysses S. ... Grant at Appomattox Court House, Virginia, marking the beginning of the end of the grinding four-year-long American Civil War.
