Correct Answer: Ecstatic

Solution : The correct choice is the second option .

Ecstatic describes a state of extreme happiness or joy, conveying a feeling of overwhelming delight or excitement, which is similar to the given group of words "feeling or expressing overwhelming happiness or joyful excitement".

The meanings of the other options are as follows:

• Intricate means something that is complex, detailed, or has many small parts that are often interconnected or complicated.
• Scintillating means something sparkling, shining, or brilliantly lively; it is also used to describe something that is witty, clever, or brilliantly engaging.
• Escalate means to increase rapidly in intensity, scope, or magnitude; to grow or develop into something greater or more serious.