Answer:
Use commas after introductory a) clauses, b) phrases, or c) words that come before the main clause. a. Common starter words for introductory clauses that should be followed by a comma include after, although, as, because, if, since, when, while. While I was eating, the cat scratched at the door.
Point of view can back up main ideas, theme, and /or thesis
Answer: Fabio's attitude changed because he'd be in the parade.
Explanation: Fabio is excited to be able to participate in the parade. The focus of the question isn't on why he'd be in the parade or how? But on what makes his attitude change. Every other factor mentioned corroborates that he'd be participating in the parade.
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.
