In how many musical contexts can the theremin be used for?

here you go

Explanation:

The theremin is a monophonic instrument; which is to say, it can only produce one pitch at a time. It has about a five-and-a-half octave range. Its low range can sound like a cello or string bass, mid range to upper range can be vocal-like and the top end is brilliant and piercing.

(steala) is the answer you are   looking for good luck

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.