Why does so little of the moon appears be lit in this position?

The moon appears to be only partially lit due to its position relative to the Earth and the Sun. This phenomenon is known as the moon's phase, which changes as it orbits the Earth. When we see a small portion illuminated, it indicates that the moon is in a phase such as a crescent or waning gibbous, where only a sliver of its surface is reflecting sunlight towards us. The varying angles of sunlight and the moon's position create these different appearances throughout its cycle.