Answer:
The suitable environmental conditions like nutrients, water, PH and temperature promote the bacterial growth on pies.
Step-by-step explanation:
According to the ingredients of pies, they include eggs, milk, water and sugars. Hence they are very nutrient enrich for the bacterial growth like there are proteins, carbohydrates and lipids in the pies.
And the given temperature conditions are optimum temperature condition for higher bacterial growth.
And in pies, there are small spaces through which air can easily pass. So the oxygen supply is also favorable for growth.