A form of locomotion found among some of the smaller lemurs and tarsiers is

a. bipedalism

b. vertical clinging and leaping

c. knuckle-walking

d. quadrupedalism

Vertical clinging and leaping.

Explanation:

Lemurs and tarsiers are known as prosminians. Prosminians is the term used for the primates that can grab. Lemurs and tarsiers are arboreal primates and native of Madagascar and Asia respectively.

These lemurs and tarsiers shows the leaping and vertical clinging from one surface to another. They cling vertically on the trees and jumps from one branches to another as they are adaptive according to their arboreal habitat. They leap on the different branches of the trees.

Thus, the correct answer is option (b).