How can the mechanical advantage of a lever be increased?

a) by applying a larger force
b) by making the lever shorter
c) by applying the force farther from the fulcrum
d) by moving the fulcrum away from the load

Answer;

C) by applying the force farther from the fulcrum

Explanation;The mechanical advantage of a machine is the factor by which it multiplies any applied force. It is a measure of the ratio of output force to input force. Mechanical advantage of levers depends on how far away each are from the fulcrum. The mechanical advantage of a lever is increased when either the effort is moved further away from the fulcrum or the load is shifted closer to the fulcrum, or both.

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It is evolution, because we all have some of the same traits like eye color or shape or ears.