Final answer:
Each domino falls due to the transfer of potential energy to the next, facilitated by gravitational pull, aligning with the second law of thermodynamics promoting a drive to greater stability.
Step-by-step explanation:
The explanation true to the scenario where a line of dominos is knocked down is C: Each domino fell due to the transfer of potential energy. When the first domino is tipped over, it transfers its potential energy to the next domino in line, initiating a chain reaction.
Gravitational pull does play a part because it ultimately brings the dominos down towards the ground, but it is not the primary cause for each subsequent domino to fall. Instead, the force exerted by each falling domino on the next one is the central cause of the continuation of the sequence.
The second law of thermodynamics supports that the falling of dominos increases entropy in the system, hence contributing to the overall drive to greater stability as they move to a more stable state by releasing stored potential energy.