Concept: Motion: A body is said to be in motion if its position changes continuously with respect to the surroundings with time. The motion of an object could be uniform or non-uniform depending on whether its velocity is constant or changing. Uniform and non-uniform motions of objects can be shown through graphs. The speed of an object is the distance covered per unit of time. Uniform Motion: It is a motion in which a material point moves in a straight line and covers equal distance in equal intervals of time. [ alt="F2 J.K 14.9.20 Pallavi D19" src="//storage.googleapis.com/tb-img/production/20/09/F2_J.K_14.9.20_Pallavi_D19.png" style=" width: 168px; height: 148px;"> Non-uniform Motion: It is a motion in which the velocity varies with time. [ alt="F1 Madhuri Teaching 27.04.2022 D4" src="//storage.googleapis.com/tb-img/production/22/04/F1_Madhuri_Teaching_27.04.2022_D4.png" style="width: 229px; height: 220px;"> Explanation: The change in the position of an object with time can be represented on the distance-time graph. When an object travels equal distances in equal intervals of time, then it moves with uniform speed. This shows that the distance traveled by the object is directly proportional to the time taken. Thus, for uniform speed, a graph of distance traveled against time is a straight line. Therefore, from the above discussion, the correct answer is B) It is moving with uniform speed.