Why is being under the band of stability a problem?

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b. colder climates near the equator c. large waves on the cost of europe d. warm climates in northern europe

Which factor is likely to impact the possible number of compounds ?