A healthcare research organization is consolidating various types of research data (clinical trials, patient surveys, and medical records) into a centralized data lake on AWS. The data, stored in multiple formats and databases, needs to be securely managed and easily accessible for analysis by authorized researchers. The organization requires a solution to manage this diverse data in a unified manner while ensuring compliance with stringent data security and privacy regulations. Which AWS service should the organization implement to effectively manage their data lake, ensuring secure and governed access to the data for analysis?