I got a question for you: The CNO cycle (for carbon -- nitrogen -- oxygen) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton -- proton chain reaction. Unlike the latter, the CNO cycle is a catalytic cycle. It is dominant in stars that are more than 1.3 times as massive as the Sun.\n\nAnswer this question based on the passage: the cno cycle dominates in which types of stars?
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The relevant information is: It is dominant in stars that are more than 1.3 times as massive as the Sun.
Therefore, the answer is stars that are more than 1.3 times as massive as the Sun.
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