Answer:
Ideas that the author most wants readers to know.
Explanation:
Since this is an informational text, the key ideas would be what the author most wants readers to know.
Generally speaking, that is correct. A dystopia is the opposite of a utopia, and is a place which we define as unpleasant or bad. Therefore, what you might find in a dystopia is what you would consider as being unpleasant or bad. Hence, if you think polluted lakes and rivers are unpleasant, then they are likely to be part of a dystopia "for you". However, each person's dystopia may be different, as it depends on personal preference, or in this case, personal disgust.
P = the number of photos added is independent.
t = the thickness of the scrapbook is dependent.
hope this helps!!