The object represented by this graph is moving

away from the origin at a constant velocity.
away from the origin at a decreasing velocity.
toward the origin at a constant velocity.
toward the origin at a decreasing velocity.

The object represented by this graph is moving toward the origin at constant velocity.

Option 3.

Explanation:

In the figure, x-axis is representing increase in the time and y-axis is presenting increase in the distance from bottom to up. But the line in the graph which is plotted is decreasing from high distance to small distance with increase in time. So this indicates that as the time is increasing, the distance is decreasing.

And the object is moving toward the origin as the distance of the object motion is found to decrease with increase of time as per the graph. But the slope of the graph is found to be almost constant, this indicates that the velocity of the object is constant. Thus, the object represented by this graph is moving toward the origin at constant velocity.

answer; ///i do believe that the correct answer is ; ///(physical change);

its c its is a mixture of gases