ANS:A - distance

Distance is a measure of the extent of space between two points or objects. It represents the length of the path traveled by an object from one point to another. In physics and everyday life, distance is often measured in units such as meters (m), kilometers (km), miles (mi), or light-years (ly), depending on the scale of the distance being measured. The choice of unit depends on the context and the magnitude of the distance involved. Distance can be measured along a straight line (known as linear distance) or along a curved path (such as the circumference of a circle or the arc of a curve). In physics, the term "displacement" is often used to refer to the distance between two points measured along a straight line, while "distance" can refer to the length of any path traveled. Distance plays a crucial role in various fields, including physics, astronomy, navigation, engineering, and everyday activities. It is fundamental to understanding the spatial relationships between objects, calculating speeds and velocities, determining the size and scale of objects, and navigating through physical space. In summary, distance is a fundamental concept that quantifies the separation between two points or objects and is measured in units of length along a path traveled.