Answer:
I start in little but I end in full, you'll find me in half and complete.
Goliath, The Jolly Green and Andre are all examples of this.
Environmentalists want to keep this from drying.
What has keys but no locks, Space but no room, You can enter but you can’t exit.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What sphinxes employ and players enjoy.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?