Answer:
B
Explanation:
A causation in math is an indication of a relationship between two events where one even is affected by the other. It occurs where the value of an event increases or decreases as a result of changes in values of the other event.
In this case, A: The walking speed decreases as the slope of the hill increases
In the case of C : The number of cars on the highway decreases as the amount of snow fall increases
For D : The miles travelled increase with the hours driven
However for the case of B: There is an equal scenario for the two events where the number of people flying kites remains the same even when the number of people sailing increases. This does not show a causation.