Answer:
Thornton, a seasoned gold prospector, saves Buck from being beaten to death by the odious Hal and then becomes Buck's master. From then on, a deep and abiding love blossoms between man and dog. Their relationship is a reciprocal one—Thornton saves Buck, and Buck later saves Thornton from drowning in a river.
Explanation:
I believe it would be C. line. A column is used to hold up structures, and they always stand up straight. So yes, line is your answer
Some examples are
biker
laker
dancer
