The answer is D, it is diverse with international themes etc...
1. he said he was an aerospace engineer
2. she says she works in the National History Museum
3. the Doctor said their son studies at university
4. the Astronaut said they are in space
5. He says he teaches physics to his friend
6. Mother says she loves the youngest girl
Stanza's are the building blocks of formal poetry, like paragraphs in a story or verses in a song.
The answer is a it’s the only one that truly makes sense