Answer:
As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster.
Step-by-step explanation:
A white dwarf also known as degenerate dwarf is a star or an electron degenerate matter and is as massive as the Sun but only about as large in size as planet Earth.
The maximum mass of a white dwarf is about 1.4 times the mass of the Sun.
Also, as the mass of a white dwarf increases, the pressure must increase to resist gravity and to do this, the electrons must move faster.