Magazine009 Question 4

Distractors
Force on one end, the axis on the other end, and the resistance between the two.
Resistance on one end, the axis on the other end, and force between the two.
A central axis, with force on both ends.
Key
A central axis, with force on one side and resistance on the other.
Question
In the Functional Anatomy column “Levers in the Human Body” by Christy Cael, what is a first-class lever characterized by?