Which of the following would happen if the normal force and gravitational force acting on an object were unequal? the object would move left or right. the object would move up or down. the mass of the object would increase. the temperature of the object would decrease.

Well, the normal force and the force of gravity are equal, however, they travel in opposite directions. Mass never changes and temperature has to do with the ambient environment and the object itself. That eliminates 3 and 4. The force of gravity pulls downwards as we see it, so that eliminates option 1. Your answer is option 2.

The object would move up or down(Option 2)