Which adaptation is likely to be common among prey species?

Camouflage.  

Explanation:

Camouflage is an adaptation in which a species evolves to resemble its background. It is a technique used by many animals to blending with their surroundings. It is used by both side in battle to survive. Prey animals use camouflage to remain undetected by their predators, and predators use camouflage to unseen by their prey.

Predator and pray relationship. Pray predation is a predation when a organism adapt to survive to avoid being eaten. The adaptation help to predator in hunting for food. Predators have weapon that help to kill the prey.

the answer would be   10%