a sea floor a windblown desert a site deep underground a site covered by a glacier
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following areas is most likely to form metamorphic rocks such as gneiss and schist?
Possibilities:
- a sea floor
- a windblown desert
- a site deep underground
- a site covered by a glacier

a site deep underground