Explanation:you can email me the document if you want so i can help
Answer:
That
Explanation:
Who, Which, When, Whose, That, Where are 6 of your basic relative pronouns
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.
Run on sentence. Without punctuation the sentences are frantically incorrect and therefore a running sentence