Question

how do river affect the economy explain

Answer 1

rivers supply the water for us for drinking, washing clothes, for agriculture , etc., They are the complete sources of water. By using the river water farmers irrigate their crops which lead to income by selling. so rivers do affect the economy.

Answer 2

Source of Transport
Production of Hydro-electricity
Necessary to sustain agriculture and plant and animal life 
Source of sediments that fertilise the soil
Fish Source of water 
Source of irrigation
Recreation