Об­ра­зуй­те от слова IMPORTANCE од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

Surprisingly enough, old factories and plants have become ______ to French tourism. In France, every year, no fewer than 1400 companies, heritage museums or industrial sites draw 20 million visitors.