Answer:
The correct answer is 'they indicate state of being'.
Step-by-step explanation:
There are four moods in English:
Imperative: for instructions or commands. (Get up!)
Indicative: for factual information. (Cats have four legs)
Interrogative: for questioning. (Are you sure?)
Subjunctive: for cause-result. (If you were a millionaire, what would you do?)
All four moods are used to indicate reality, the state of being of the utterances whether conversation or narration.