7912. He has saved money because his wife is frugal.

✅ The correct answer is option C.
Strict : demanding that rules concerning behaviour are obeyed and observed.

Economic : relating to economics or the economy.

Economical : (of a person or lifestyle) careful not to waste money or resources.

Miserly : of or characteristic of a miser.

Frugal : sparing or economical as regards money or food.

Synonym of Frugal is Economical