Everything in the world _______?

Decays, it comes to an end and also dies inevitably

Decays, comes to an end and dies inevitably

Decays, and as it comes to an end it dies inevitably

Decay, they come to an end and then die inevitably

"Everything in the world decays, comes to an end, and dies inevitably."

This succinctly expresses the natural process of deterioration and eventual cessation of all things.