add commas, semicolons, or colons if needed. otherwise, submit the text without any additional punctuation…

add commas, semicolons, or colons if needed. otherwise, submit the text without any additional punctuation. circadian rhythms are behavioral mental and physical changes that occur on a twenty - four hour cycle.

add commas, semicolons, or colons if needed. otherwise, submit the text without any additional punctuation. circadian rhythms are behavioral mental and physical changes that occur on a twenty - four hour cycle.

Answer

Brief Explanations:

在列举多个并列的形容词（behavioral、mental、physical）修饰名词（changes）时，需要用逗号分隔。

Answer:

Circadian rhythms are behavioral, mental, and physical changes that occur on a twenty - four hour cycle.