It is the key technique in the process of close reading.
a. scanning
b. annotating
c. prereading
d. prewriting

I think the correct answer from the choices listed above is option B. It is annotating that is the key technique in the process of close reading. It means underlining or highlighting keywords and phrases that would seem relevant to what is your purpose. Hope this answers the question. 

Since a female is both xx chromosome and the male passes down the x chromosome, than the offspring would be female since a female is xx.