Jorge is sitting on a couch. Gravity exerts a downward force on him. Based on Newton's law of action-reaction, the other force acting on Jorge is the – * A) downward force of the floor.
B) downward force of air pressure.
C) upward force of momentum.
D) upward force of the couch.

B.
I’m not 100% but it’s obviously not an upward force and I don’t think it’s A. Cause air can’t do that.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

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