Which of the following is categorized as a telephony tool?

Interactive Voice Response (IVR) is classified as a telephony tool because it specifically involves phone technology that automates interactions with callers. IVR systems allow users to navigate a phone system using voice commands or keypad inputs, providing a way to route calls, access information, or complete transactions without the need for direct human interaction. This capability is integral to improving efficiency in customer service environments and is commonly used in support centers to handle common inquiries and direct customers appropriately.

In contrast, digital whiteboards are generally utilized for visual collaboration and brainstorming, while social media messaging is focused on communication through social platforms. Remote support tools are designed for assisting users through direct screen-sharing or access to devices, which does not inherently utilize telephony technologies. Therefore, IVR stands out as the clear telephony tool in this context.