I personally think its 1 due to prior knowledge of this course
The best answer to the question '<span>The artists of the Mexican muralist movement mixed classical and modern art techniques in a style of..' would be letter b. social realism. The theme of the movement is social realism wherein the artworks mostly send a political and social opinion of the artist.</span>
The answer would be, "Characteristics, practices, and customs that are passed down through family, clans, gender groups, or larger cultural groups."
The first one is more of a genetic thing, while the third one shows family heirlooms or such.
Hope this helps! :)