What does the prefix oct mean?

8

Explanation:

examples:

octagon(8 sides)

octopus(8 tentacles)

you need to include the text. we have no idea what you are referring to

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.