Correct Punctuation for Lists

Very Hard Standard English Conventions Conventions Of Punctuation

Analyze the following sentence:

The research indicated that several factors contribute to climate change these include greenhouse gas emissions deforestation and industrial activities.

Which of the following options correctly punctuates the sentence?

The research indicated that several factors contribute to climate change: these include greenhouse gas emissions, deforestation, and industrial activities.

The research indicated that several factors contribute to climate change; these include greenhouse gas emissions deforestation and industrial activities.

The research indicated that several factors, contribute to climate change: these include greenhouse gas emissions deforestation, and industrial activities.

The research indicated that several factors contribute to climate change these include: greenhouse gas emissions, deforestation, and industrial activities.

Hint

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