The body because that's where you have to put all your details supporting your evidence.
1. The truck tumbled down the street rapidly.
2. The man drudged home from a day of work sadly.
It said I could add my own choice of adjectives or adverbs after the sentences and so, I did just that. I hope this helps!
The answer is the third one.
Answer: "Then we ate pizza and played video games with my family"
Explanation:
"Then I invited Hailey to spend the night at my house." wouldn't make sense due to the previous sentence stating that they already discussed unpacking Hailey's sleeping bag.
"Finally, I helped Hailey pack up her belongings in the morning." also wouldn'y make sense because "Finally" doesn't work in the middle of a sentence. Same thing with "Finally, Hailey’s mother agreed to let Hailey sleep over."