The resultant of all forces acting on the body is constant and not equal to zero. What is the state of the body?

The path the body has a certain mass m. Then, according to the condition of the problem, several forces act on the body, the resultant of which is the force F, which is constant and has a certain value. In this case, according to Newton’s second law, this force will give the body an acceleration equal to a = F / m. Since the force is constant, then the acceleration will have a constant value.
Therefore, the correct answer is that the body moves uniformly.