Select the most appropriate option for blank (5)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. leaning.
The correct word to fill is "leaning" because it describes the action of chimpanzees bending forward while moving on their knuckles, which is consistent with the behavior of "knuckle walking."
The other options—"ragging" (bullying), "making" (producing), and "stalling" (delaying)—do not fit the context of movement.
Therefore, "leaning" is the most appropriate choice.