Answer:
The given blank can be filled large intestine.
Step-by-step explanation:
The large intestine is not just formed of cells, it is also a house of trillions of bacteria called the gut flora. The majority of these bacteria are beneficial. The helpful bacteria thrives majorly in the large intestine and in some section of the small intestine. These bacteria help in many ways as they help in the production of vitamin K and vitamin B12, helps to monitor the growth of dangerous bacteria, and other activities.