Explanation:
When the body is moving upward from the ground, the distance taken is positive. This can be explained by considering the convention used to define the direction of distance.

Convention for Distance:
In mechanics, the convention for distance measurement is generally taken as positive in the direction of motion and negative in the opposite direction.

Body Moving Upward:
In this case, when the body moves upward from the ground, it is moving in the positive direction. Therefore, according to the convention, the distance taken by the body is positive.

Alternative Conventions:
It is important to note that different conventions can be used depending on the context or the specific problem being analyzed. In some cases, distances are measured from a reference point and can be positive or negative depending on the direction of motion relative to the reference point.

Example:
For example, if a person is standing on a hill and walks downwards, the distance taken can be considered negative with respect to the starting point at the top of the hill. Similarly, if the person walks upwards, the distance taken can be considered positive.

Conclusion:
In the given question, when the body is moving upward from the ground, the distance taken is considered positive according to the convention used in mechanics. It is important to consider the direction of motion and the reference point when determining whether the distance is positive or negative.