Answrs: Part a) "Facts from a documentary.." This is talking about the benefits of artificial organs instead of donated ones.
Part b) "There are several ..." Because it is a sentence that is likely to precede facts. The others are opinions about how something 'SHOULD' be, and aren't presenting facts or claiming something.The first one 3ven says "I think..." which is clearly an opinion.
Answer:
<u>a. It should be familiar.</u>
Explanation:
The most importan thing when choosing a topic is for it to be intresting to you, and it helps if it is familiar. Being related to the subject you have chosen, would help in the research because there is some knowledge you already have on it.
the authors author's opinion
the author's worldview
the author's illustrations
the author's knowledge
B, because snarling is not associated with something loving/nice but it also doesn't indicate something challenging. It's simply an image of something angry/evil