Find the part of the given sentence that has an error in it. If there is no error, choose 'No error.'
The good news is that many large cities, have began to heed climate change warning signs.

The correct answer is (b) large cities, have began to.
Explanation:
The verb "began" is incorrect because it is the past tense of "begin." Since the sentence uses the present perfect tense "have," the correct form should be the past participle "begun." The correct phrase is "have begun to heed."
Corrected sentence:
The good news is that many large cities have begun to heed climate change warning signs.
Meanings of key words:
· Heed: To pay attention to or consider seriously.
· Began: The simple past tense of begin.
· Begun: The past participle of begin, used with auxiliary verbs like "have."