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: What occurs if oxygen cannot be obtained at a sufficient rate? Answer: anaerobic respiration
Anaerobic respiration occurs if oxygen cannot be obtained at a sufficient rate.

Question: A collapsing nebula leads to what process? Answer: nuclear fusion
A collapsing nebula leads to nuclear fusion process.

Question: Which of these most likely has the GREATEST mass? Answer: Horse

Horse of these most likely has the greatest mass.