Displacement:
Displacement is a physical quantity that refers to the change in position of an object. It is a vector quantity because it has both magnitude and direction. Displacement is represented by a straight line segment with an arrow indicating its direction.

Vector:
A vector is a quantity that has both magnitude and direction. It is represented by an arrow with a specific length and direction. Vectors can be added or subtracted using vector addition or subtraction rules. Displacement is a vector quantity because it has both magnitude (the distance between the initial and final positions) and direction (the straight-line path from the initial to the final position).

Scalar:
A scalar is a physical quantity that has only magnitude and no direction. Scalars can be added or subtracted using regular arithmetic operations. Examples of scalars include distance, speed, time, temperature, and mass. Displacement is not a scalar because it has both magnitude and direction.

Tensor:
A tensor is a mathematical object that represents a physical quantity that has multiple components and transforms in a specific way under coordinate transformations. Tensors are used to describe physical phenomena that involve multiple directions and dimensions. Displacement is not a tensor because it does not have multiple components or transform in a specific way under coordinate transformations.

Conclusion:
Based on the definitions and properties of displacement, we can conclude that displacement is a vector quantity. It has both magnitude and direction, which makes it different from scalars. It is not a tensor because it does not have multiple components or transform in a specific way under coordinate transformations. Therefore, the correct answer is option 'B' - Vector.