Answer:
The Quality of the soil
Step-by-step explanation:
The soils in middle colony are high in nutrition's and have suitable texture for agriculture. This made it easy for farmers to grow different variety of crops with little resources. Compared to other regions, middle colonies were regarded as the most prosperous agricultural sector IN United States.
In contrast, the soils in New England colonies were full of rocks. This made it really hard for crops To grow properly. On top of that, New England territories also had harsher climates that often kill a lot of crops before it can be harvested.