Please select the word from the list that best fits the definition Provides purpose to your

reading

Survey

Question

Read

Write

Depending on the context it is used if may be either Survey or a Question but I think in this case it is a question
Hope it helps

Are you referring to tectonic plates?

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun.