What functionality does a dashboard provide in Databricks?

A dashboard in Databricks is designed to consolidate and visualize key metrics, making option B the correct choice. Dashboards allow users to create a summarized view of important data by integrating visualizations such as graphs, charts, and tables. This capability enables stakeholders to gain insights and monitor performance at a glance, fostering informed decision-making based on real-time data.

The other options describe functionalities that do not align with the primary purpose of a dashboard. While dashboards can enhance data visibility, they are not intended for data entry, writing datasets, or functioning as storage repositories. Instead, Databricks is designed for interactive data processing and analysis, with dedicated areas for data manipulation and storage. Therefore, the emphasis on visual representation of key metrics distinctly characterizes the utility of dashboards within the Databricks environment.