One of the most serious issues in the world today is inflation. Governments, private industry, and consumers share responsibility for the continued increases in the cost of living, but so far no solution that involves cooperation among these groups has been implemented Which is the meaning of the word "implemented" in the passage?

improved
invented
put to use
thrown away

Put to use is the answer

Explanation:

One of the meanings of implement is to give effect and ensure the actual fulfillment.

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.