At which location on the 'Environments' figure would you expect gneiss to form?

Gneiss is a high-grade metamorphic rock, meaning it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.

However, without the 'Environments' figure mentioned in your question, it's difficult to provide a specific location. Generally, gneiss forms deep within the Earth's crust where there is enough heat and pressure for metamorphism to occur. This is typically at tectonic plate boundaries where there is significant heat and pressure from the movement of the Earth's crust.