What command would you use to check the environment status of a Cisco device?

The command to check the environment status of a Cisco device is "show environment." This command is specifically designed to provide detailed information about the device's hardware environment, including temperature readings, fan status, power supply status, and other critical metrics that indicate the health of the device. By using this command, network professionals can monitor the operational status of the physical components of their devices, which is essential for maintaining overall network reliability and performance.

The other commands listed do not serve this specific function. For example, "check status" and "display environment" are not recognized commands within Cisco's command-line interface and will not yield the required environmental data. Likewise, "show health" is not a standard command that provides an overview of environmental conditions, which makes "show environment" the only accurate choice for checking a Cisco device's environment status.