Question

forces cause objects to move or change direction.
thermal
unbalanced
balanced
chemical

Explanation:

• Thermal forces relate to heat and do not directly cause objects to move or change direction.
• Unbalanced forces, according to Newton's laws of motion, result in a net force that causes an object to accelerate (move or change direction).
• Balanced forces result in no net force and thus no change in the object's motion (it remains at rest or in constant - velocity motion).
• Chemical forces are related to chemical reactions and not to the motion of objects in the sense of changing their velocity.

Answer:

Unbalanced