I believe it is B because mining tons were very popular therefore overcrowded
The factor that had the most influence in the transition from wandering tribes to the emergence of cities would be "<span>a. food," since it was a surplus of agriculture that allowed people to develop trades other than farming. </span>
Germany invaded Poland unprompted, which started WWII.
<u>Answer</u>:
The common thing between these three types of activities is that they form a production chain giving customers the provision of finished goods or services.
Primary production involves acquirement of raw materials for production like coal, metal, rubber tapping etc.
Secondary production involves manufacturing and assembly process that involves the use of such raw materials.
Tertiary production involves commercial services that support the production and distribution process.
All the processes occur in line with each other, where the working of one is essential for the other.
