The numerical ratio of displacement to distance for a moving object is

Four cars $A, B, C$ and $D$ are moving on a levelled road. Their distance versus time - graphs are shown in Figure. Choose the correct statement.

Manik was travelling by train. When the train was about to come to a stop, he saw someone jump onto the platform and hit the floor headfirst. Once the train stopped, he immediately got down and rushed to the injured person. He checked for any signs of internal injuries and finding none, he helped him get an auto. 

Why did the jumping man fall forward on the platform? Define the property. 

Manik was travelling by train. When the train was about to come to a stop, he saw someone jump onto the platform and hit the floor headfirst. Once the train stopped, he immediately got down and rushed to the injured person. He checked for any signs of internal injuries and finding none, he helped him get an auto. 

What values were exhibited by Manik?