B The podcast host is having a conversation with an expert on icebergs. Read their conversation and complete the table.Host: Today, we’re talking about icebergs on our podcast. Joining me now is Dr Henry Tao. Dr Tao, your job is to study icebergs. What can you tell us about them?Dr Tao: Icebergs are big pieces of ice—and I mean big. Some can be as big as a building, and the biggest ones can be even bigger than a city. They can have all kinds of shapes.Host: And they float in the ocean?Dr Tao: That’s right. Although they move on the surface of the ocean, they’re actually made of fresh water.Host: Interesting. So how do they form?Dr Tao: Large chunks of ice break off from glaciers or ice shelves.Host: I see. Are they important for our oceans?Dr Tao: Oh yes. Very important. They’re useful to many ocean animals, like polar bears, seals and seabirds. Seals and seabirds often rest on icebergs, and polar bears like to hunt from them.Host: Do icebergs play any other role in the environment?Dr Tao: Yes. Icebergs often have important chemicals in them. As the icebergs melt, these chemicals go into the seawater. This helps keep the environment healthy.Host: Wow! Who knew icebergs were so important?Dr Tao: Important … and beautiful! In my opinion, icebergs are among the most beautiful sights in the natural world.Host: Thanks for sharing your thoughts today, Dr Tao.All about icebergsWhat are icebergs? Big (1) with different shapes.What are their sizes? • Some can be as big as (2) .• Some can be bigger thana city.What are they made of? (3).How do they form? Large chunks of ice (4) from glaciers or ice shelves.Why are they important? • They provide resting places for seals and seabirds.• They are used by polar bears for (5).• They help keep the (6) healthy.