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

Age causes reduction of elasticity in all organs.
What causes reduction of elasticity in all organs?

Some viruses carry a few viral enzyme molecules within their capsids.
Some viruses carry a few viral enzyme molecules within their what?

Venus has a warmer average surface temperature than earth.
Which of the following has a warmer average surface temperature than Earth?