Answer:
C) to generate sufficient white space between two lines of text
Step-by-step explanation:
In typography leading refers to the vertical distance between text lines. It is an old term that was originated by the use of leads to separate lines in a typewriter.
Generally most word processors use a default leading type that automatically adjust depending on the largest font on each line. This sometimes might result in different leadings within the same paragraph, and that is when you have to adjust yourself the leading space.