What is the MAIN cause of increased erosion, especially for soil? A) Strong Winds
B) Flash floods
C) Human Activity
D) Movement of glaciers

I am thankful for whoever try to help answer my question. I am honestly between A and C I am not sure. Please give your opinion on what you think of this question every answer helps. Thank you to whoever helps me because I am confused. I hope you have a beautiful day!
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Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

If anyone who can me with this hw? i would really appreciate it