The analogy is meant to show parallels between two sets of words. Fertile is to arable as vague is to clouded. If you understand either pair it can be used to decipher the meaning of the other pair you don't know.
Answer:
1. D
2. F
3. C
4. G
5. H
6. E
7. A
8. J
9. B
10. I
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You probably already got the answer but:
Keeler deals mainly with the Pilgrims while Bruchac discusses immigrants who came later
Keeler uses an argument that appeals to facts and emotions
Keeler looks toward the future while Bruchac looks at the past