The Correct answer is D. There is more obstruction to flow in the low-gradient areas of the channel relative to the slower-moving headwaters region of the flow.
The pace is the directional speed of an object in movement as an illustration of its fee of change in role as located from a selected frame of reference and as measured by way of a specific trend of time (e.g. 60 km/h northbound). velocity is an essential concept in kinematics, the branch of classical mechanics that describes the motion of our bodies.
The pace is a bodily vector amount; both importance and direction are had to define it. The scalar absolute fee (magnitude) of velocity is called velocity, being a coherent derived unit whose quantity is measured in the SI (metric device) as meters in line with 2d (m/s or m⋅s−1). To have a consistent velocity, an object has to have a steady velocity in a constant route. constant path constrains the item to move in an immediate direction as a result, a steady pace way motion in a direct line at a consistent pace.
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