The correct answer is "Eyedropper". The question asks for the tool used to select colors from different areas of an image. The Eyedropper tool is specifically designed for this purpose, allowing users to sample and select colors from any part of the image by clicking on it. The other options listed (Brush, Healing Brush, and Clone Stamp) are not meant for selecting colors, but rather for painting, retouching, and duplicating parts of the image, respectively.