Answer:
Carelessness: accident
As comedy often produces laughter, carelessness can produce accidents.
Step-by-step explanation:
This is called an Analogy. Let's take a look/ comedy: laughter. We read analogies like this Comedy is to Laughter. We replace the colon with is to. This analogy means: Something that is comedic has laughter.
Now use the process of elimination:
Sorrow is to joy ❌
Sentence is to paragraph ❌
Bicycle is to transportation ❌
Carelessness is to accident ✅