All energy comes from the: water air sun environment

When water moves through the water cycle it changes between these states of matter over and over again. ... When water at the ocean's surface is heated by the Sun it gains energy. With enough energy, the molecules of liquid water change into water vapor and move into the air. This process is called evaporation.

the answer is age;the speaker is aware of running out of time at the end of his life

Explanation:

it is trying to say that we all have alot of things to do before we die but we dont know if we can complete all of them before we die