To what tolerance of measurement can sea surfaces be measured from modern satellite surveys?

A) it is created from magma

The average lifespan of a bear is 25 years

Many foreign companies buy/build hotels in areas therefore most of the profit from tourism goes to these companies rather than the local economy or local people. 
also, these foreign companies might only employ foreign workers with experience meaning they receive more pay whereas local people would be employed for low skilled jobs and lower pay. 

thats all i can think hope it : )