Look at the image which element of art is best represented line
border
contrast
soft focus

Contrast because the sky really pops from the image compared to the land

Contrast because the sky and the ground are so different

The theme of social protest remained a consistent focus for jacob lawrence throughout his career. in the 1960s lawrence was inspired by news reports and photographs, including images of segregated lunch counter sit-ins and stories of the   freedom riders in the civil rights movement. from the 1970s onward, lawrence's work focused less explicitly on contemporary social issues.