What's the adjective in the adventurner told an interesting story

Before we find the adjective in the sentence, we need to know what an adjective is.

An adjective is a describing word for a noun.

So in the sentence a noun would be story. Adjectives usually come before the noun, so interesting is your adjective that you needed to find.

Why? Remember the definition of an adjective and the story is described as interesting.

your answer is b. "with strong wording encouraging readers to take action."