Final answer:
Histones are the proteins that maintain the first level of DNA organization in a eukaryotic cell by forming the core component of chromatin, around which DNA is wrapped.
Therefore, option b is correct.
Step-by-step explanation:
The first level of DNA organization in a eukaryotic cell is maintained by histone proteins. Histones are the primary protein components of chromatin, acting as spools around which DNA winds, and play a critical role in the structure of chromosomes. By controlling the winding and unwinding of DNA, histones regulate the access of cellular machinery to the genetic material, which is crucial for replication and gene expression processes.Histones are proteins that help package DNA tightly into a structure called chromatin by wrapping the DNA around themselves. This helps to regulate gene expression and protect the DNA.