Question

an increase in what property of an object causes its inertia to increase?
volume
mass
velocity
acceleration

Explanation:

Inertia is a property of matter. According to Newton's first law of motion, the inertia of an object is directly related to its mass. The greater the mass of an object, the greater its inertia. Volume is the amount of space an object occupies and is not directly related to inertia. Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Neither velocity nor acceleration directly cause an increase in inertia like mass does.

Answer:

mass