Arms that are longer than legs, and a short stable lumbar spine are traits associated with
a. vertical clinging and leaping
b. arboreal quadrupedalism
c. brachiation
d. full-time bipedalism

C.) Brachiation

Explanation:

Brachiation or arm swinging is a form of arboreal locomotion in which the animal swings from one branch to the other, using only their arms, this form of locomotion in the long evolutionary term is related to shorter legs as they are less heavy, and allow better swinging, and stable lumbar spines that counteract with the movement, for it not to get deformed with the constant swinging.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.