When energy becomes cheaper, miners can do more mining, leading to an increase in blocks. Given that people are only willing to pay so much for a transaction to complete, there is only so much demand at a certain price point. Once the supply of blocks increases, you eventually have price points where the demand no longer matches the supply. At this point a miner would lower their fee until the demand increases back to supply.
Supply and demand drives prices, but it does so through individual actors setting prices they are willing to pay/accept (or by algorithms that have been setup by some human who set up the rules by which it will set prices).
Supply and demand drives prices, but it does so through individual actors setting prices they are willing to pay/accept (or by algorithms that have been setup by some human who set up the rules by which it will set prices).