Abody of water or air moving in a definite direction, especially through a surrounding body of water or air in which there is less movement

The answer to the question a body of water or air that moves in a definite direction through a surrounding body of water or air where in there is less movement is called “Current” as the movement of either air / water at a definite direction.

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

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.