what kind of grammar usage is this?

<p>During the rainy season in Hawaii, [temperatures become a little cooler and showers more frequent], but the sun still shines most days.</p>

<p>i know that there are 2 subjects and a verb</p>

<p>This is like asking, “What kind of world is this?”</p>

<p>Could you make your question a bit more specific?</p>

<p>Is this an actual sample question? Are you supposed to correct it also?</p>

<p>Yeah, it’s a real SAT question. It’s correct as it is.i am just trying to find out the why the sentence in the bracket is correctly written.</p>

<p>If you cannot identify an … error, it means the sentence was correct. </p>

<p>What error do you see? A clumsy sentence is not necessarily incorrect.</p>

<p>He doesn’t understand why there isn’t a verb after “showers”.</p>

<p>In the phrase “showers more frequent,” the verb “become” is implied.</p>