Choose the appropriate example of the Adverb of Frequency:

The correct answer is Option (1) → "He rarely misses his appointments."

An adverb is a word that tells how, when, where or how much something happens. It can also describe an adjective or another adverb, for example she sings sweetly, very hot.

Adverb of frequency:

• An adverb of frequency tells how often something happens (always, often, sometimes, rarely, never).
• In this sentence, rarely means almost never. It tells how often he misses his appointments.

Why the Other Options are Incorrect?

Option 2: "She laughs loudly." — Incorrect. The adverb here is "loudly". It tells how she laughs, so it is an adverb of manner.

Option 3: "I wrote the letter yesterday." — Incorrect. The adverb here is "yesterday". It tells when I wrote the letter, so it is an adverb of time.

Option 4: "They sang a song there." — Incorrect. The adverb here is "there". It tells where they sang, so it is an adverb of place.