Even though there are no instructions, it is easy to see that we are supposed to choose between the adjective and the adverb for each of the blanks.
Answer:
Our government regulated the use of public transportation. Its (1.) ready access to commuters became a (2.) serious problem because many workers do not have their own vehicle. To our public commuters, I urge you to extend your (3.) full understanding as this measure is for our own safety.
Explanation:
An adjective modifies a noun, while an adverb modifies a verb, an adjective, or another adverb. In the lines above, all sentences need adjectives, since we are modifying the nouns "access", "problem", and "understanding". It is the access that is ready, the problem that is serious, the understanding that is full. We are not modifying any verbs. The example below will help clarify the difference between the usage of adjectives and adverbs:
- You have my full attention. - "Full" is an adjective and it modifies the noun "attention".
- You are never fully paying attention. - "Fully" is an adverb and it modifies the verb phrase "are paying".