Answer:
28- D
29- D
30- A
31- A
Step-by-step explanation:
I KNOW YOU DIDN'T NEED AN EXPLANATION, BUT HERE'S ONE JUST INCASE: I HOPE THIS HELPS!
28- While the paragraph does discuss the fact that giant pandas have lost a large portion of their historic range, it is not the primary point of the paragraph. Rather, it is an additional piece of information that makes the concept of pandas being at risk of losing their natural habitat more evident.
29- In paragraph 3, it specifically states "...To protect panda's habitat..."
30- While the final paragraph alludes to the idea that this digital technology can be used in various areas, the "last but one paragraph" seems to have a more important concept of just being generally really helpful. Being helpful seems to be the bigger theme here.
31- I think the best title for the text would be option A because it is the correct type of technology (digital) and it has the correct purpose (to save pandas). Also, this simple title would most likely have the greatest affect on a reader as it is moving.