It's only visible when it's cold. It gets harder when it's higher. Its presence is often unnoticed, but you'll always notice you absence. What is it? Answer Breath.
I am best greeted like an old friend. Starting with the beginning of the middle and end of the end. You can pretend, you can hide and run from me, my friend. But I am coming for all, the big and the small. The large and the tall, I can start with a trip or a fall. I make grown men tremble upon hearing my call. What am I? Answer Death.
From my head to my mouth I run through my bed; I carve riches from earth, and carry life to the head. What am I? Answer River.
It starts with f and ends with k, is a four letter word and in absence of this you use your hand. What word is? Answer Fork.
I come in a lot of different sizes. Sometimes, I drip a little. If you blow me, it feels really good. What am I? Answer A nose.