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

Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem.
What can demonstrate the decrease in energy, biomass or numbers within an ecosystem?

Metallic bonds gives a coil of copper wire the ability to conduct electricity well.
What gives a coil of copper wire the ability to conduct electricity well?

Food is glucose used for the bacteria.
What is glucose used for the bacteria?