Question 4 (6.66 points) question 4 unsaved lava rock is used in building roads, and question 4 options: pumice, a glass that comes from lava, is used for grinding and polishing materials they use pumice, a glass that comes from lava, for grinding and polishing materials question 5 (6.66 points) question 5 unsaved countries with many volcanoes, such as italy, mexico, and new zealand, use underground steam as a source of energy, and question 5 options: homes in reykjavik, iceland, are heated with water from volcanic hot springs reykjavik, iceland, uses water from volcanic hot springs to heat homes question 6 (6.66 points) question 6 unsaved john has question 6 options: a prosperous business, a pretty wife and two lovely children. a prosperous business, a pretty wife, and he has two lovely children.