Answer:
I am needed for most animals and hardcover books
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?
I have an eye but cannot see. I take time to generate and can dissipate in seconds. What am I?
A little house full of meat, no door to go in and eat.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic