Final answer:
The host most likely uses casual and informal language to create a friendly atmosphere, while also referencing space exploration to root the discussion.
Step-by-step explanation:
The host most likely says "Houston, we have a podcast" and "let’s go lightspeed and jump right ahead to our talk with Dr. Tom Williams" in paragraph 1 to establish the discussion as informal but rooted in the subject matter. The use of casual language like "Houston, we have a podcast" creates a friendly atmosphere for the audience, while the reference to "lightspeed" and "Dr. Tom Williams" signifies that the podcast is about space exploration.