"She stood up very silently, frowning, as if she were making a decision. Then she came over to me and put her arms around me. She kissed my cheek." This change was not a good change because it doesn't any affection between the Giver and Rosemary thus making the scene more bland in the play than the book.
"It was daylight, early morning, and the air was thick with smoke that hung, yellow, and brown, above the ground. Around him, everywhere, far across the expanse of what seemed to be a field, lay groaning men." This change was effective because unlike the book that just showed one scene of war, the play showed multiple events such as bombs exploding and tanks making war seem more gruesome and horrifying.
"There was a time, actually-you'll see this in the memories later-when flesh was many different colors. That was before we went to sameness." This change wasn't an effective change. This is because everyone having the same skin color in the book gives us an idea of what sameness is like whereas now in the play you don't see the results of sameness as much which tones down a key part of the community.