Answer:
Gained - Community based, controlled societal setup. Sacrifised - Elements of humanity & freedom of choice
Step-by-step explanation:
As per above lines from 'The Giver' by Lois Lowry - Community control is gained, however after letting go indiscriminate humanity feelings (love, warmth, mutual pain). The associated rigidities also restricted people's choices regarding various domains of life. For gaining a peaceful societal setup - with people protected from environment, healthy & productive - we sacrifised with a trade off with elements of humanity, freedom of choice.