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 causes waves to bring sand up onto the beach during summers? Answer: low energy
Low energy causes waves to bring sand up onto the beach during summers.

Question: Approximately how many weeks does the fetal period last? Answer: 30 weeks
The fetal period lasts approximately 30 weeks weeks.

Question: What complex carbohydrates are the polymers of glucose? Answer: starches

Starches are complex carbohydrates that are the polymers of glucose.