Why is a tripod considered essential when using slow shutter speeds?

A tripod is considered essential when using slow shutter speeds primarily because it provides stability to the camera, which is crucial for avoiding blur in the images. When the shutter speed is slow, even minor camera movements during the exposure can result in unwanted blurriness. A tripod keeps the camera steady, ensuring that any movement is minimized, which is especially important for capturing sharp details in low light or when using long exposure techniques. This stability allows photographers to maintain clarity and focus in their images, which is essential for high-quality results.

Other options do not directly address the core function required for slow shutter speeds. While adding weight may affect handling, it does not contribute to reducing motion blur. Creative angles are indeed facilitated by tripods, but they are not the primary reason for their use with slow shutter speeds. Changing lenses is not related to the need for stability while shooting with slow shutter speeds, making it less relevant in this context.