Answer:
The function of DNA is tied to its structure. ... The sugars and phosphates link the nucleotides together to form each strand of DNA. When two strands of DNA come together, base pairs form between the nucleotides of each strand. Nitrogenous bases pair together in the following way: A-T and C-G.
None of these seem to be correct, but it seems c is due to a disproved myth that essentially is the only thing close to an answer.
Look at the water cycle, all water is connected through the water cycle
Alternating current electricity. This allowed electricity to flow further than Edison's first DC approach.
Railroads - allowed for transportation of materials to growing small cities, and large cities to become larger.
Antibiotics and antiviral medicines. - stopping deadly diseases and bacteria from spreading. This helped with many problems that would normally terminate 33% of populated areas that are infected.
Carbon dioxide, but you can minimize this by adding a paraffin lamp (this could also raise the temp. and stop heat as a limiting factor)
