Which of the following is a tool that can be used to image a USB device?

EnCase is a powerful and widely recognized digital forensics tool specifically designed for imaging and analyzing digital evidence, including USB devices. Imaging a USB device involves creating a bit-for-bit copy of the data stored on the device, which is crucial for preserving the integrity of the original data during an investigation. EnCase provides a range of features that allow forensic examiners to acquire, analyze, and report on digital evidence, making it highly suitable for this purpose.

The other choices listed do not serve the specific function of imaging data from USB devices. WinRAR is primarily a file compression tool, Microsoft Word is a word processing software used for document creation and editing, and Photoshop is an image editing application. None of these tools possess the capabilities needed for digital forensic imaging, such as ensuring data integrity, creating forensic images, or handling the specific data formats associated with USB devices. Thus, EnCase stands out as the appropriate choice for imaging USB devices in a forensic context.