Answer:
refrigeration and gmos (this is based on research but it is souly opinion based because it all depends on what you think is the most important. please accept this answer with discretion.)
Explanation:
refrigeration because it helped improve shelflife for food all across the world.
gmos because it saved many crops from complete devastation and saved farmers from endless debt and depression (of money).
Okay, here's what might help:
1. Avoid crises.
2. Agree that change is a part of living.
3. Move toward your goals.
4. Keep everything postive.
C. Nutrients that strengthen bones and teeth, help keep blood healthy and keep the heart and other organs working properly
