[Q]: The waistband on my pants was loose.

effect:
[A]: I put on a belt.
[Q]: The gardener pulled the weeds.

effect:
[A]: The weeds came out of the soil.
[Q]: The woman hummed to herself.

cause:
[A]: She was in a good mood.
[Q]: The army surrendered the battle.

cause:
[A]:
They were outnumbered.