What practice later replaced hunting and gathering for finding food?

Which characteristics best describe aaron douglass’s painting, song of the towers

In 1990, the average income for an american worker was $1,518 per month. in 2000, the average income for an american worker was $2,632 per month. during this time period, a basket of necessities (food, housing, etc.) increased from $657 per month in 1990 to $1,402 per month in 2000. the real value of income ▼ increased decreased over that 10-year period.

Describe two reasons that cities developed along rivers during the industrial revolution. for full credit, your response must be at least 2 complete sentences.