Correct Answer: Economical

Solution : The correct choice is the second option .

The word frugal implies the wise and careful use of resources, especially money, to avoid unnecessary expenses. Economical is a suitable synonym, as it also conveys the idea of being careful with financial resources. Both terms suggest a sense of thrift and efficiency in managing money.

The meanings of the other options are as follows:

• Imprudent : It means lacking discretion or wisdom, especially in managing financial matters.
• Negligent : It means a lack of proper care or attention, which is not the intended meaning in the context of managing money wisely.
• Honest : It refers to truthfulness and integrity.