John thornton can best be described as… a. buck's best and most caring owner. c. a friend of buck's owner who doesn't have enough money to purchase him. b. buck's owner who is occasionally annoyed by buck. d. the person that buck was given to in exchange for $1600.

a. Buck's best and most caring owner.

Explanation:

John Torton is the owner of Buck in the story The Call of the Wild, John saved Buck´s life and for that reason Buck loves him and admires him, in that matter some time Buck wins John money in order to pay off some debts that he had, they both develop a strong bond throughout the story and become really close.

6. true

hiv/aids are in fact really common in blood types

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)