Final answer:
In the context of Physics, velocity and displacement are vector quantities because they include both magnitude and direction, while speed, distance, and time are scalar quantities as they possess only magnitude.
Step-by-step explanation:
The student is working with concepts of vector and scalar quantities in Physics. Vector quantities have both magnitude and direction, whereas scalar quantities have magnitude only, with no direction.
(b) Velocity is a vector quantity because it describes both the speed of an object and the direction in which it is moving.
(c) Displacement is a vector because it represents the change in position of an object in a specific direction from a starting point.
On the other hand:
(a) Speed is a scalar quantity as it only describes how fast an object is moving, without any direction.
(d) Distance is also scalar, representing how much ground an object has covered during its motion.
(e) Time is scalar since it represents duration, which doesn't involve direction.
To answer the original question by the student, vector quantities are velocity (b) and displacement (c).