Which feature is true about the core of a fiber optic cable?

The core of a fiber optic cable plays a crucial role in the fiber's function, as it is specifically designed to carry light signals that transmit data. The core is where the transmitted light is guided through total internal reflection, allowing for high-speed and efficient communication over distances. This feature is essential because the effectiveness of a fiber optic system relies heavily on the core's ability to contain and direct the light signals with minimal loss.

The other options contain inaccuracies regarding the core's properties or functions. While the cladding is generally larger than the core to facilitate the guiding of light through the core, it is not a defining feature of the core itself. Additionally, the core can be made from various materials, including glass or plastic, and is not limited solely to plastic. The core indeed influences the overall attenuation of the fiber, as its material and diameter will affect signal strength and clarity. Therefore, focusing on its primary role, the statement that the core carries the light signals accurately reflects its fundamental purpose within a fiber optic cable.