does natural monopoly has a significant economies of scope? industry, monopoly, regarding, only, 2010

vagabond

Hi,

i have read in the textbook that a natural monopoly has high economies of scale. The 2010 qbank states one of the answer regarding natural monopoly as shown below:

A natural monopoly exists when economies of scale or scope are so significant that total industry production should be produced by only one firm.

is it correct?

thanks