Why were many factories built near rivers? a) the rivers provided a cool breeze. b) people often traveled to work on steamboats. c) fish from the river was used to feed the workers. d) water power was needed to run the machines.

D) Water power was needed to run the machines

Explanation:

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.