He chose to die because his creater did not have any sympathy for him and he feels worthless. The moster's creater does not at all want any relationship with his creature.
For humans, lactic acid fermentation occurs when you exert yourself to the point that your muscles can no longer get oxygen fast enough to generate energy via aerobic respiration. When this happens, your muscles produce energy by the far less efficient process of lactic acid fermentation. This is also true in most other mammals In bacteria, however lactic acid fermentation can either be the normal method that a bacteria has for producing energy, or it can be a method used when there is no oxygen available. Which of these will be the case depends on the type of bacteria.
There are ni sentences there but anyhow the meaning if account as used in the passage above is account:to record or report data
The answer would be a simile. It can also be alliteration!