An example of a scalar is and an example of a vector is velocity; acceleration velocity; displacement speed; velocity distance; speed

An example of a scalar is speed and an example of a vector is velocity.

Distance is also a scalar.

Acceleration and displacement are vectors because they have both magnitude and direction.

The other options do not fit because:

velocity/acceleration = vector/vector

velocity/displacement = vector/vector

distance/speed = scalar/scalar

the answer is either b or c

they are made of gases.

they have a spherical shape.

they make energy through fusion.