by adding vectors that gradually increase in length and placing them above the current top row of vectors
Explanation:
Since initially the motion map shows that length of vectors are gradually decreasing which means that the acceleration vector is opposite to the velocity due to which it is continuously decreasing with time.
Now once it will take turn then the velocity and acceleration both are in same directions.
So here we will have motion map is like that the vectors will have length gradually increasing which shows that after taking turn the acceleration and velocity is in same directions.
so correct answer will be
by adding vectors that gradually increase in length and placing them above the current top row of vectors