We went to phoenix, which is the capital of arizona.

what is the action verb?

is
which
to
went

the animal shelter ad with animals in cages, starving and dying.

explanation:

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.