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: Ionic bonds between two atoms require one metal and one what? Answer: nonmetal
Ionic bonds between two atoms require one metal and one nonmetal.

Question: Which crust lies deep inside the ocean? Answer: oldest
Oldest crust lies deep inside the ocean.

Question: Which process must occur for clouds to form? Answer: condensation

Condensation must occur for clouds to form.