What is one way that animators have historically checked their poses

over the centuries, the technologies have naturally been refined: in the nineteenth century the first devices were born, the so-called kinetoscopes, fenachistoscopes or zoopraxiscopi, which allowed to animate the images drawn on disks or films that were rotated by hand.

i believe the answer is: a.  abstract forms were often used to represent human figures.

representing human figures in abstract forms is often used in the geometric period, not hellenistic  period.   during the hellenistic  period,   aesthetic value derived from creating arts which mimic the actual shape of a certain object or individuals.

hope this ! < 3