Which of the following is MOST likely managed directly by the operating system?

Email is typically managed by a separate application or service (email client, email server) that runs on top of the operating system.

Database connections are handled by database management systems (DBMS) and applications, which interact with the OS but are not directly managed by it.

Memory allocation is a fundamental task of the operating system's kernel, which involves assigning physical or virtual memory blocks to running processes and applications. The OS directly controls how much memory each program can use and prevents conflicts.

Instant messaging is managed by specific messaging applications that utilize OS resources but are not a direct OS function.