Why do authors use causal relationship in play’s

I believe authors use casual relationship in plays because its a logical pattern, where a clear action (cause) has a reaction (effect).

Most of these patterns happen to show how the main character has emotional reaction perhaps through dialog, gesture, expression, or physical sensation. The character makes a decision on what to do next. The character are goes through events that reveal motivation setting impact, conflicts.

these are the reasons why authors use casual relationship in play's

he will find out what went wrong or happened and how.