The italicized word is <em>extremely </em>and the correct answer is intensive.
The word extremely is an adverb, which means that you can rule out <em>noun, adjective, </em>and <em>verb </em>immediately. You can also rule out <em>empty word </em>because <em>extremely </em>has a particular meaning on its own, which means that it cannot be empty. Thus, we are left with one option only - <em />intensive.
The three on the left are first person and the three on the right are second-
Answer: Part A: D They separated into different groups long ago.
Part B: The answer is: "it also seems like they didn't mix much with outside groups until the arrival of Europeans in the seventh century"
Explanation: I took the test hope this helps!