D is the correct answer since all others are highly unlikely.
This is called Homeostasis
Answer: Lactic acid fermentation
Explanation:
The lactic acid fermentation can be defined as the process by which sugar is being converted into lactic acid.
There is no emission of carbon dioxide during the whole process. In case of curd formation. The bacteria convert the milk into curd and provides it a sour taste.
It is converted by help of bacteria known as Lactobacillus acidophillus. This method is very frequently in many of food processing industry.
