Newton's Second Law states that:

Newton's Second Law, often summarized as F=ma (force equals mass times acceleration), indicates that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to the mass of the object. Therefore, when a net force is applied to an object, it will experience a change in motion—meaning it will accelerate in the direction of the applied force. This principle highlights the relationship between force, mass, and acceleration, making the statement about the change of motion being directly proportional to the applied force accurate according to Newton's Second Law.

The other statements do not correctly reflect the details of Newton's Second Law. For example, the idea that acceleration is inversely proportional to the force applied misrepresents the law's core relationship. The assertion regarding mass affecting speed is too vague and does not clearly connect to the dynamics of motion described in the law. Finally, the statement regarding bodies remaining at rest is more closely related to Newton's First Law of Motion, which deals with the concept of inertia rather than the relationship between force and acceleration.