Let's break down the sentence and discuss why "economical" is the correct choice:
The sentence is: "She could save money if she bought ________ electronics."
(A) Economical - This is an adjective that means providing good value for the money spent. In the context of buying electronics, "economical" suggests that the electronics are reasonably priced and offer good value in terms of cost and performance.
(B) Economic - This is an adjective related to the economy or economics. It is not the best fit in this context because it doesn't directly describe the type of electronics one would buy to save money.
(C) Economize - This is a verb that means to save money or avoid waste. While it is related to saving money, it doesn't fit well in the sentence structure.
(D) Economics - This is a noun that refers to the social science that studies the production, distribution, and consumption of goods and services. It doesn't fit the sentence, as it doesn't describe the type of electronics one would buy.
Therefore, "A. Economical" is the correct choice because it directly describes the type of electronics that would help someone save money by being reasonably priced and providing good value. The complete sentence is: "She could save money if she bought economical electronics."