Which is a sentence fragment? 1. Because I already went to the store.
2. The store had been closed for two days.
3. I had to go to the mini-mart instead, but I didn't want to.
4. Because the store was closed for two days, I went to the mini-mart.

4

"because the store was closed for two days I went to the mini-mart.

comfortable

explanation:

one type of the adjectives is predicate adjective. a predicate adjective is an adjective which follows a linking verb and modifies or refers back to the main subject of that linking verb.

it usually is used just before the noun it modies.

here in this example:

'penguins seem comfortable in the coolest habitats', comfortable is the predicate adjective which follows the linking verb 'seem' and modifies the noun.