Which is an adaptation?

I don't see any examples, but to help adatation is the process of adapting or being adapted.  

Example: A horses teeth grinding grass

An adaption is any heritable trait that helps an organsim, such as a plant or animal, survive and reproduce in its environment.  

Explanation:

Adaptation is the evolutionary process where an organism becomes better suited to its habitat. ... An example is the adaptation of horses' teeth to grinding grass. Grass is their usual food; it wears the teeth down, but horses' teeth continue to grow during life.

i have no idea what the answer is im sorry.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.