5107. S1: Frozen foods are so popular today that many people wonder how they ever lived without them. P: Near the North Pole, where the ground stays frozen all the year around, there is no problem of preserving foods. Q: Actually, people who live in cool climates have had frozen foods for a long time. R: Ice helped them when they could get it, but they couldn’t get it very often. S: But people who live in warm climates have not always been able to keep food fresh. S6: Now refrigerators and deep freezers preserve many foods that could not be kept any other way. The Proper sequence should be: