Come up with a different one.. or see what do you did wrong in the first one ( I think .)
Choices 1, 2, and 3 all emit carbon dioxide, not enough to destroy the planet, but they still can cause it over a large amount of time, due to Carbon Dioxide being a greenhouse gas. Therefore, the answer is 4. Bicycles do NOT emit any carbon dioxide at all.
Answer:
cold with high salt content
During DNA replication, the hydrogen bonds must be broken between the complementary nitrogenous bases in the DNA double helix
