Answer: D.It's personification; Running makes the speaker feel extremely happy.
Personification refers to a rhetorical device in which animals and inanimate objects are given human qualities. In this case, the speaker claims that his legs laugh. This is an example of the legs being personified. The meaning that the author tries to convey with this figurative language is that running makes him feel extremely happy.
The author is writing the passage to talk about Conrad's life as a black man in Nigeria and the way he feels about the other black people's lives in Nigeria too.
