The fault lay, in many cases, with the emigrants themselves. they acted injudiciously. their fears caused them to drive too fast, in order to get over quickly. their animals were too weak to be urged in this way. a. annoyed b. formal c. fearful d. grateful

A

Explanation: apex

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.