NEET BIOLOGY

Detailed explanation-1: -The article ‘an’ is used when the noun that follows begins with a vowel, and it’s mentioned for the first time. There are exceptions to this rule: when a superlative adjective precedes the noun (largest bird). In this case, the article ‘the’ is used, because there can be only one largest species of birds.

Detailed explanation-2: -A parrot is a tropical bird with a curved beak and brightly-coloured or grey feathers. Parrots can be kept as pets. Some parrots are able to copy what people say. Synonyms: mimic, copycat [informal], imitator, (little) echo More Synonyms of parrot.

Detailed explanation-3: -We call the the definite article and a/an the indefinite article. For example, if I say, “Let’s read the book, ” I mean a specific book. If I say, “Let’s read a book, ” I mean any book rather than a specific book.

Detailed explanation-4: -The word ‘ostrich’ starts with a vowel and hence, in most cases the blank will be filled with ‘an’. But, in this case, we are taking in the superlative form about the entire species of ostriches, and hence, the article used should be ‘the’.