Geologists may choose to lick a mineral to identify it. what mineral is the geologist expecting with this test

The earth's internal process which drives seafloor spreading is

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

Plz asap can someone find the answer or the mark scheme or anything plzzz you : ) ‘it's perfectly understandable that hundreds of millions of people around the world live close to volcanoes’ use evidence to support this statement. (6 marks)