I think it's
Examine the resources linked in the articles.
Answer:
"If that's what you think," said Chen, "Then that's what you need to include."
Explanation:
The two elements are:
An interesting hook that helps draw the reader in
The essay's main idea
Calaveras Reservoir. Calaveras Reservoir is located primarily in Santa Clara County, California, with a small portion and its dam in AlamedaCounty, California.