Hint: Antonyms are those words that express a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other.For example- good and bad, sweet and sour, short and tall.Complete answer: The word ‘save’ refers to storing something, especially money.Let us analyze the options given to us in this question:Option (a.), 'spend', refers to giving (money) for payment of goods, services, to benefit someone or something. Therefore, option (a.) is correct as it is antonymous to the given word ‘save’.Option (b.), ‘protect', refers to keeping safe from harm or injury. Therefore, option (b.) is incorrect as it is not antonymous to the given word ‘save’.Option (c.), ‘beat', refers to striking (a person or an animal) repeatedly and violently. Therefore, option (c.) is incorrect as it is not antonymous to the given word ‘save’.Option (d.), ‘help', refers to making it easier to do something by offering one's services or resources to someone. Therefore, option (d.) is incorrect as it is not antonymous to the given word ‘save’.Note: In a question where we have to find the opposite of the given word, we sometimes do not have options that exactly mean the opposite of the given word. In this case, we have to select the option which is the most anonymous to the meaning of the word in the question. Some antonyms of the given word ‘save’- endanger, waste, give, use up.