Cause and Effect Theory in the light of #Spirituality

What's meant by Cause and Effect Theory?

Every effect is the result of some cause.

Smoke is the result of fire. Here Fire is the cause
and smoke it's effect.
There must be some cause due to which we have many Universal aspects, their appearance,
their movement.
Functioning of the internal organs of the body is
the result of some cause , which is eternal.