Answer : The correct answer is- Force acting upon the object and the mass of the object.
Acceleration can be described as rate of change of velocity of a particular object with respect to time. In other words, an object is said to be in acceleration when its velocity changes with respect to time.
According to Newton's second law of motion,
F = m X a
a = F/m
Where, F = force acting on an object, m is the mass of an object, and 'a' is the acceleration.
Thus, force and mass are the two forces that affect the level of an object's acceleration.