Explanation:

- The word "lukewarm" typically means moderately warm, or it can describe a lack of enthusiasm or interest. It implies a mild or indifferent attitude.

- Option 1: Enthusiastic

- Enthusiastic refers to showing intense and eager enjoyment, interest, or approval.

- This is a strong opposite to the indifference that "lukewarm" can imply.

- Correct Answer

- Option 2: Moderate

- Moderate refers to average in amount, intensity, or degree.

- It doesn't starkly oppose the meaning of "lukewarm."

- Option 3: Friendly

- Friendly refers to being kind and pleasant.

- It doesn't directly contrast with "lukewarm" as an attitude.

- Option 4: Fervent

- Fervent means having or displaying a passionate intensity.

- While fervent is enthusiastic, it is more specific about being passionate.