Of the literary devices you provided to choose from, snap hots and thought shots are not even devices so they fall off the list.
sensory language can explain the senses the character is using - helping figure out his reflections,
but figuratve language can helop the best. the character says something figuratively and we can analyze what they meant to find out what they were thinking
Molten Mattet Seeps through the crust and forms new land.
Answer:
Convection? I'm pretty sure that's it