To determine which of the given physical quantities is a scalar, let's review the definitions of scalars and vectors:

• Scalars: Scalars are physical quantities that have only magnitude but no direction. Examples include mass, temperature, and energy.
• Vectors: Vectors are physical quantities that have both magnitude and direction. Examples include velocity, force, and displacement.

Now, let's analyze each option:

• Velocity: This is a vector quantity because it describes not just how fast an object is moving, but also the direction of motion.
• Temperature: This is a scalar quantity because it only involves magnitude; there is no direction associated with temperature.
• Force: This is a vector quantity because it involves both magnitude and direction (e.g., the amount and direction of push or pull).
• Displacement: This is a vector quantity because it measures the change in position of an object and includes direction.

Based on the definitions above, the correct answer is:

• Temperature is the only scalar quantity listed among the options.

Therefore, the physical quantity represented by scalars from the given options is Temperature.