Final answer:
To determine the intervals during which the train is moving to the left, we need to analyze its velocity. Negative velocity indicates the train is moving to the left, positive velocity indicates the train is moving to the right, and zero velocity indicates the train is not moving.
Step-by-step explanation:
In order to determine the intervals during which the train is moving to the left, we need to analyze the velocity of the train. If the velocity of the train is negative, then the train is moving to the left. If the velocity is positive, then the train is moving to the right. So:
A) Increasing intervals - The train is moving to the left during intervals where the velocity is decreasing.
B) Decreasing intervals - The train is moving to the left during intervals where the velocity is increasing.
C) Constant intervals - The train is not moving to the left or right during intervals where the velocity is zero.
D) Random intervals - The train's movement cannot be determined without additional information.