Answer:
What word in the English language uses all five vowels plus Y in alphabetical order, and uses each only once?
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, unknowingly, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I have an eye but cannot see, You'll head inside when you see me.
I am the hole in the night, the ever watchful eye. I return in a cycle, to enlighten the sky.
I start with T end with T and within me is T.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?