What component is responsible for converting the electrical signal into a viewable image?

The component that is responsible for converting the electrical signal into a viewable image is the image sensor. The image sensor's primary function is to capture light and convert it into an electric signal, which is then processed into a digital image. This process involves detecting the amount of light that falls onto each pixel, turning that information into a digital representation that can be displayed on screen or stored for later use.

While the lens plays a crucial role in focusing the light onto the image sensor, it does not convert the signals but rather facilitates the process by directing light appropriately. The processor is key in further processing and encoding the image data but is not involved in the initial conversion from electrical signals. The storage unit's role is to hold the data after it has been processed, rather than converting it into a viewable format. Thus, the image sensor is the correct choice because it is specifically tasked with the conversion of light into an electrical signal, ultimately allowing us to view images.