Maybe depending on what apple they are
I think an apple because apples contain glucose. Glucose is pretty much plain sugar. The sugar start to ferment and rot.
Eggs rot before apples.
Yes, apples can rot.
Storage apples will rot faster than apples freshly picked.Summer apples will generally go bad faster than fall apples.
oxidisation
apples rot man. gross.
Apples rot slower than bananas because they are harder. Hard fruits or vegges rot very slow, for example carrots. But compare carrots to cucumbers which rot really fast because they are soft. Same goes for apples and bananas.
i think in the middle is where apples rot first
Oh, dude, it's like a race to the bottom of the barrel! So, technically, red apples rot faster because they have a thinner skin and higher sugar content compared to green apples. But hey, if you're just gonna let them sit there and turn into mush anyway, does it really matter? Just eat them before they turn into a science experiment, man.
Hamburgers
because they are old
Sugar doesn't cause anything. Organisms that use sugar cause things. In the case of rotting fruit, microorganisms of various types are likely consuming the sugar contained in the fruit. Thus, the rot is better said to be caused by microorganisms. In some cases, sugar actually helps slow or prevent the rotting process. When sugar ferments, it converts to alcohol, which in turn can kill a number of microorganisms. That is one way trees protect themselves in the winter. The sap rises, and if it ferments, it functions as an anti-microbial and an antifreeze.