Have* this is because has* is past tense and have is more appropriate since there are multiple things you are referring too (Mercury, Venus, Earth and Mars). To be honest, these planets have a molten core.
B.Linear but i could be wrong
It’s written in 3rd person limited
Starr snaps that Khalil didn’t kill herself. Start starts to panic and then cries as she gets to shooting the interview
Explanation:
As a "part of speech," transitional words are used to link words, phrases, or sentences. They help the reader to progress from one idea (expressed by the author) to the next idea. Thus, they help to build up coherent relationships within the text.