Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: The metallic bond is responsible for the properties of metals.

Output: What is responsible for the properties of metals?

Input: Consider Input: The main advantage of urea is its very low toxicity.

Output: The main advantage of urea is its very low what?

Input: Consider Input: A moose eats a plant is an example of a living thing that depends on another living thing to survive.
Output: Which statement best identifies a living thing that depends on another living thing to survive?