Final answer:
ArchR is a software used for single-cell chromatin accessibility analysis, aiding in genomics and epigenetics research.
Step-by-step explanation:
ArchR is an integrative and scalable software package designed for single-cell chromatin accessibility analysis. This software allows researchers to study how different cells regulate the use of their DNA and which genes are potentially being turned on or off in individual cells. Such analysis is critical in understanding the complexity of biological systems and plays a significant role in fields like genomics and epigenetics.