Choose five advances in 20th century science that you think are the most important

1. Airplanes

2. The automobile

3. Nuclear power

4. Antibiotics

5. The Internet

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.

food chain i would say only because there is competition on getting food and survival