An iceberg is a chunk of a glacier that has broken off and is floating in the ocean. Icebergs are made of fresh water while the ocean is salt water. The difference in the densities of fresh and salt water is minimal. Because of this, 90% of the iceberg is actually below the surface of the ocean water. As with an iceberg, there is more to tundra plants than what you see on the surface. Which statement below supports the analogy?