Nathaniel Hawthorne had mixed feelings about the religious and philosophical legacy left by his Puritan ancestors, as did many Americans in his day. In our world today, name two Puritan ideals would we welcome, and two ideals are we glad to be rid of.

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.

i would say a because the main idea is what the author is the point the author is trying to get across.

again the answer is c