instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem.
answer:
What can demonstrate the decrease in energy, biomass or numbers within an ecosystem?


question:
Saturated hydrocarbons hydrocarbons contain only single bonds between carbon atoms.
answer:
What hydrocarbons contain only single bonds between carbon atoms?


question:
Earthquakes are found primarily in lines around the edges of some continents.
answer:

What are found primarily in lines around the edges of some continents?