Definition:
an adjective is a word that describes or modifies a noun or pronoun. In this case, 'obvious' is being used as an adjective to describe or modify a noun, such as 'The obvious difference.'.
Rules:
might be used with adverbs such as 'very' or 'extremely'.
Examples:
1. His obvious anger was frightening.
2. There was an obvious lack of enthusiasm.
3. It was an obvious mistake.
Tips:
be aware that the adjective 'obvious' carries the risk of sounding blunt or patronizing.