Answer:
Yes indeed, it is because it has an -<em>r</em>
It is one of at least five forms of locomotion used by snakes, the others being lateral undulation, sidewinding, concertina movement, and slide-pushing. Unlike all other modes of snake locomotion, which include the snake bending its body, the snake flexes its body only when turning in rectilinear locomotion.
Hauptsmturmfuhrer Amadeus von Linden
I just took the test, the answer was "It develops an anxious tone by inserting imagery associated with damage and injury into the passage."
Hope I could help, good luck!