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.
During the harsh winter, Tom and Bessie take a fruitless journey to the lower valley in search of food. As they return to the lodge, Bessie becomes increasingly weak and can barely walk. Recognizing that she will likely die shortly, Tom attempts to gather food for her and comforts her with chants and songs. After reminiscing about their lives together, Bessie dies and Tom buries her next to his father. Singing and mourning her death, Tom returns alone to the lodge.
I think it might be the word " soul mate " ?
Successful warriors seem to be highly respected in this culture.
