Answer:
To modify the Miller-Urey experiment you could not subject the balloon to bumps of electricity and leave it in the sun. So you replace the energy of electrical storms, focusing on the balloon with solar energy.
Explanation:
As shown in the question above, some scientists do not believe that the earth was influenced by a lightning storm. For this reason, many of the Miller-Urey experiment, designed to simulate conditions on Earth before the evolution of life, would not be accepted by these scientists.
What these scientists believe that the energy present on earth in this long period of time is solar energy, since the sun was formed long before the earth. In that case, for the Miller-Urey experiment to be accepted, you should replace the bumps in electricity with solar energy.
