Here's why:

* Electric field strength is inversely proportional to the square of the distance. This means that if you double the distance from a charged object, the electric field strength will decrease by a factor of four.

* Electric field lines represent the strength and direction of the electric field. As you move further away from the charged object, the electric field lines spread out, indicating a weaker field.

Think of it this way: Imagine you have a light bulb. The closer you are to the bulb, the brighter the light appears. As you move further away, the light becomes dimmer. Similarly, the electric field of a charged object weakens as you move farther away from it.