A host seems to be running slowly. What command would help diagnose which processes are using system resources?

The `df` command reports disk space usage, not individual process resource consumption.

The `free` command displays information about total, used, and free memory, but it doesn't show per-process memory or CPU usage.

The `uptime` command shows how long the system has been running, the number of users, and the system load averages, but not individual process resource usage.

The `top` command provides a real-time, dynamic view of running processes, displaying critical information such as CPU usage, memory usage, and process IDs. This makes it an ideal tool for quickly identifying which processes are consuming significant system resources and contributing to system slowdowns.