Answer:

Introduction:
The question asks why Taro tasted the water again and again. The correct answer is option 'C' - because it was sake. Let's explore this answer in detail.

Explanation:
- Taro tasted the water again and again because it was sake.
- Sake is a traditional Japanese alcoholic beverage made from fermented rice.
- It is a popular drink in Japan and is often consumed during special occasions or celebrations.
- Sake has a distinct taste and aroma, which sets it apart from regular water.
- Taro might have been curious about the taste of sake, or he might have wanted to savor its unique flavor.
- Additionally, sake is an alcoholic beverage, so Taro might have been enjoying the mild intoxicating effect it produces.

Reasons why the other options are not correct:
a) To quench his thirst:
- This option is not correct because sake is an alcoholic beverage and it doesn't serve the purpose of quenching thirst.
- If Taro was thirsty, he would have looked for regular water or a non-alcoholic drink.
b) As he needs more water:
- This option is not correct because Taro was not looking for more water.
- He specifically tasted the water again and again because it was sake.
d) It was cold water:
- This option is not correct because the temperature of the water is not mentioned in the question.
- Even if the water was cold, it would not explain why Taro tasted it again and again.

Conclusion:
In conclusion, Taro tasted the water again and again because it was sake, a traditional Japanese alcoholic beverage. The distinct taste and aroma of sake might have intrigued him, leading to multiple tastings.