Which feature allows you to create a summary of data in Access?

The feature that allows you to create a summary of data in Access is Reports. Reports in Access are designed to present data in a formatted way, making it ideal for summarizing information from tables or queries. They enable users to organize data into a structured layout, apply aggregate functions such as sums, averages, and counts, and present the information in a clear and concise manner, often suitable for printing or sharing.

In contrast, calculated fields allow for the calculation of values based on existing data within tables or queries but do not inherently provide a summary format. Data entry forms are primarily used to facilitate data input into tables, making it easier for users to enter information correctly. Datasheets display raw data in tabular form without the formatting and summarization features that reports offer. Thus, when it comes to summarizing data effectively, Reports are the appropriate choice.