Final answer:
Hypomania is a mood state similar to mania but less severe.
Step-by-step explanation:
The correct answer is option 4) Hypomania. Hypomania is a mood state similar to mania but less severe. It is characterized by elevated or irritable mood, increased energy, and increased activity levels. While hypomania shares some symptoms with mania, it does not cause the same level of impairment and does not involve psychotic features such as hallucinations or delusions.