Why does a curve on a distance-time graph indicate acceleration? an increasing amount of time passes for each unit of distance a decreasing amount of time indicates a decreasing number of distance units an increasing distance is traveled during each unit of time a decreasing distance is traveled during each unit of time

because speed can change overtime for a car, and isn't always constant.

This distance- time graph indicates acceleration because in this graph, there is a change in the position of an object or change in the final and initial position with time. it may be in positive value if it accelerates or may be in negative value if object decelerates, because acceleration is a vector quantity.

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

the answer is a. hope this .