The correct answer to this question is "hydrogen bonds". Hydrogen bonds are intermolecular forces that form between a hydrogen atom covalently bonded to an electronegative atom (such as nitrogen, oxygen, or fluorine) and another electronegative atom. In the context of DNA, hydrogen bonds form between the nitrogenous bases of adjacent nucleotides, specifically between adenine and thymine, and between guanine and cytosine. These hydrogen bonds play a crucial role in stabilizing the structure of the DNA double helix, ensuring the proper base pairing and maintaining the genetic information stored in the DNA molecule.