Environmental monitoring systems should be in place to continuously monitor which of the listed items?

• A. Power
• B. Temperature
• C. Humidity
• D. All of the above

Answer: (D)

Continuous environmental monitoring is essential because stable conditions directly support animal welfare and the reliability of experimental results. Temperature must stay within a controlled range so animals don’t experience stress or metabolic changes that can skew data. Humidity levels also need to be tightly managed, as they affect respiratory health, skin integrity, and even microbial growth, all of which can influence outcomes. Power reliability is crucial because HVAC systems, humidity controls, lighting, and monitoring equipment depend on a steady power supply; a outage or fluctuation can trigger rapid environmental shifts and data loss. Because each of these elements can impact animals and experiments, the monitoring system should cover all of them continuously. That’s why the best choice is to monitor power, temperature, and humidity together.