Analogies

1. war:peace::soldier:_____________
marine, captain, conscientious objector, sailor

2. piccolo:flute::violin:_______
cello, saxaphone, trumpet, bass drum

3. strengthen:build up::atrophy:_______
circulatory system, death,muscles, waste away

1.marine
2. cello
3. waste away

I agree with your 2nd and 3rd answers.