How many pairs of legs do millipedes have per body segment?

Millipedes have two pairs of legs per body segment. This characteristic is a defining feature of the class Diplopoda, to which millipedes belong. Each body segment typically has a pair of legs on each side, leading to the common understanding that millipedes possess numerous legs relative to their body segments.

While the question may have suggested multiple choices indicating varying numbers of leg pairs, the correct understanding is firmly rooted in the biology of millipedes. The presence of two pairs allows for their slow, crawling movement, which differentiates them from their close relatives, centipedes, which have one pair of legs per segment. The other options do not reflect the anatomical structure of millipedes and therefore don't accurately represent the biology of these organisms.