Question

what distinguishes the three different classes of levers found in the human body?
a. where they are located in the body
b. how useful they are for performing work
c. where the components of the lever are located
d. how many moving parts the lever has
please select the best answer from the choices provided.
a
b
c
d

Explanation:

The three classes of levers (first - class, second - class, and third - class) are distinguished by the relative positions of the fulcrum (pivot), effort (force applied), and load (resistance). For example, in a first - class lever, the fulcrum is between the effort and the load; in a second - class lever, the load is between the fulcrum and the effort; and in a third - class lever, the effort is between the fulcrum and the load.

Answer:

C. where the components of the lever are located