When singing the main tune of the "Star Spangled Banner", you are singing the . a. syncopation
b. harmony
c. melody

A melody

Explanation:

that picture though

i would say the answer is b. zigzag lines of the leaves. i believe this is the answer because zigzag lines go in different direction while the other options like: the vertical lines of the trees, the dotted lines on the road, and the curved lines of the park benches go in one direction.