Which of the following would you use to check active EIGRP neighbors?

To check active EIGRP neighbors, the command "show eigrp neighbors" is specifically designed for this purpose. This command provides information about all directly connected EIGRP neighbors, including their IP addresses and the state of the EIGRP relationship with each neighbor. It enables network engineers to verify which routers are actively participating in the EIGRP routing process, their current status, and various timers related to those connections. Having this information is crucial for troubleshooting and ensuring efficient routing within an EIGRP environment.

The other options serve different functions. For example, "show ip neighbors" does not exist as a valid command in the context of EIGRP and would not provide this specific information. "Show ip eigrp interfaces" gives details about the interfaces enabled for EIGRP, without directly listing neighbors. "Show eigrp topology" displays the topology of EIGRP routes known to the router, rather than detailing the active neighbor relationships. Thus, "show eigrp neighbors" is the appropriate command to utilize for checking active EIGRP neighbors.