Alright, lets get started.
Kinetic energy is the energy that a body possesses due to its motion or say movement.
So, the temperature of that day will not effect the kinetic energy. So, A is not the answer.
Color of marbles will also not effect the motion of the marbles so, option C is also not the answer.
Number of boys and girls also not effect the motion of the marble, hence option D is also not the answer.
How hard the girl strikes the marble, will effect the motion of the marble, hence the answer is B. : Answer
Hope it will help :)