In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Hot magma beneath the surface mixes with water and forms what? Answer: gas
Hot magma beneath the surface mixes with water and forms gas.

Question: One of the main features all vetebrates have in common is what? Answer: backbone
One of the main features all vetebrates have in common is a backbone.

Question: Which layer of the earth is molten? Answer: the outer core

The outer core of the earth is molten.