In the following sentence, a part of the sentence is bolded. Choose the correct alternative that best improves the bolded part.
The number of avian species in this sanctuary have decreased significantly due to the rapid loss of natural habitat and climate change.
Show answer & explanation
Correct answer: D
Explanation
Correct Answer: has decreased
Explanation
• The subject phrase begins with 'The number of', which specifies a singular figure or total count and always takes a singular verb.
• In contrast, phrases beginning with 'A number of' take a plural verb.
• Since the head noun is the singular 'number', the auxiliary verb must be 'has' instead of 'have'.
Quick Tip:
• The number of + Plural Noun + Singular Verb (e.g., The number of students has dropped.)
• A number of + Plural Noun + Plural Verb (e.g., A number of students have dropped.)