What is the significance of the final image of Rick Grimes at the end of the comic?

The final image of Rick Grimes, looking out over the landscape, is highly symbolic. It signifies a transition from a life of constant struggle and protection to a more personal and contemplative existence. It reinforces the idea that leadership isn't a constant state and that sometimes, the greatest act of leadership is letting go and allowing others to carry the torch. The vast, desolate landscape also mirrors the ongoing challenges and uncertainties of the world.