Answer:
What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?
What asks but never answers?
What do people want the least on their hands?
A home of wood in a wooded place, but built not by hand. High above the earthen ground, it holds its pale blue gems. What is it?
Just head and foot yet never tires of dancing.
What is always coming but never arrives?