Thoreau lived on Emerson's land, which was the subject of one of his books.
Answer:
it says you're college level, so i apologize if this isn't helpful. But a cause of a cellphone could be addiction (phone addiction), the effect would be mental health issues such as prolonged anxiety, increased stress levels, and sleep issues.
Explanation:
The preposition in this case is From while the prepositional phrase is From China as it consists of the preposition from and the noun China.