[Q]: The parents forbade their children from watching the movie. 

cause: 
[A]: The movie was rated R.
[Q]: The father shut off the children's television.

cause: 
[A]: It was bedtime for the children.
[Q]: The woman felt compelled to help someone in need.

effect: 
[A]: She donated blood.
[Q]: I pushed the pendulum.

effect: 
[A]:
It swung back and forth.