When suzanna stands on the floor on the surface of the earth, of the two external forces acting on her, her perception or sensation of weight directly depends on the upward force the floor exerts on her, not the downward force of gravity.

Statement is True.

Yes, the given statement is True. For a person to perceive or sense his/her weight there has to be a Normal Force acting on them upwards.

We can understand this as when a falls in the pit on the ground, for the time the person is in the air he/she feels weightless as they don't have any weight.

This weightlessness is felt even when the weight (mg) of the person is acting downwards. So we can conclude that for a person to feel his/ her weight there has to be a Normal Force acting back on them equal to their weight.

As, in the space station people feel like they are on Earth that is felt by them because of the rotation of the Space Station which generated the Normal force on their feet making them sense weight.

Therefore, for Suzanna, of the two external forces acting on her, her perception or sensation of weight is dependent on the Upward Reaction Force from the Floor.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents