Groundwater in constricted fractures is heated past its surface boiling temperature by surrounding hot rocks. The superhot liquid expands in volume, reducing its confining pressure and flashing it into steam. Which geologic feature matches this description

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

Answer(apex)  ok i looked up two diff, sites both say the answer is a technological innovation that has allowed people to adapt to living in hot climates, plz check first good luck///

What are the options?