Why do we have a shadow?

Rays of light, from the Sun or artificial light, spread equally in all directions. When these rays of light meet a solid object, they cannot pass through it. So they come to a standstill and the area behind the object is unlit. As our bodies do not let light through, we have a dark area behind us on the¬ ground. This is called a shadow. When we move” this dark area is always with us. This is why the shadow seems to move with us.

Of course, if we are walking with the light behind us, the shadow will be in front.
Perhaps you have played a game with your friends where you run and try to ‘catch’ the shadows of your friends.