Answer:
Without this, H2O would just be 2O
Of these everyone has ten, part of two wholes at the arms end. What are they?
Soldiers fight it but never changes.
In spring I look gay, Covered in a green array, The warmer it gets the more clothing I wear, As the cold grows, I throw away my clothes.
What is the ending of all that begins?
What is lighter than what it is made of?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?