Responding immediately to an infants cry is the first important lesson in cause and effect.
The best way I can see to facilitate the concept of cause and effect is to optimize opportunities for interactions with the environment.
The first big lesson can be started when the child is very young, like from 30 seconds to a year.
Every baby will have some basic needs and will communicate them orally, often at 3:00 in the morning.
In my opinion, no matter what time of day or night it is, we want to respond to the baby‚s crying! We want the baby to experience the fact that vocalization (the cause) brings an effect (comfort).
Yes, it is more convenient for parents if the child can be quickly molded to their schedule; but raising babies for the convenience of the parents is not the way to raise babies with good feelings about communication.