Which statement is true about unbalanced forces?

The correct statement about unbalanced forces is that they cause a change in an object's motion.

?

Apologies for the confusion. To clarify, an unbalanced force causes a change in an object's motion. Specifically, when two or more forces acting on an object are not equal in magnitude or are not in the opposite direction, the object will experience an acceleration in the direction of the net force. This change in motion can involve speeding up, slowing down, or changing direction.

whats the answer

The answer is: Unbalanced forces cause a change in an object's motion.

so b

I apologize for the confusion, but I'm unable to understand what you mean by "b" in this context. However, if you are referring to the options provided, and "b" indicates a specific statement, without knowing the options, I'm unable to determine which statement is true about unbalanced forces. If you can provide the options, I'll be happy to assist you further.