Correct Answer: B

Rationale: The correct meaning of the word 'Augment' is 'to add to something.' Therefore, choice B, 'Add to,' is the correct answer. Choices A, C, and D are incorrect because they all suggest actions that involve reducing or decreasing something, which is the opposite of augmenting.

Correct Answer: A

Rationale: The correct answer is A. A child with a stuffy nose might find it hard to breathe. 'Breathe' is the correct verb form in this sentence. 'Breathing' is the present participle form and could also work, but in the context of the sentence, 'breathe' is more suitable. 'Breath' is a noun referring to a single inhalation or exhalation of air, not the correct form in this context. 'Breadth' is a noun referring to the extent or measure of something from side to side, which is completely unrelated to the ability to breathe with a stuffy nose.

Correct Answer: A

Rationale: A prefix is the correct answer. A prefix is a word part attached at the beginning of a word to modify its root word, changing the definition or grammatical function of the word. Examples of prefixes include "un-" in "unhappy," "re-" in "redo," and "pre-" in "preview." Choice B, "Affix," is incorrect because while a prefix is a type of affix, not all affixes are prefixes. Choice C, "Suffix," is incorrect as a suffix is a word part added at the end of a word to change its meaning. Choice D, "Vocab," is incorrect as it refers to vocabulary or words related to a particular subject rather than a word part placed before a word.

Correct Answer: B

Rationale: The correct answer is 'B: Outdated.' Obsolete refers to something that is outdated or no longer in use. 'Innovative' (choice A) means introducing new ideas or methods; 'Effective' (choice C) means successful in producing a desired result; 'Advanced' (choice D) means far on or ahead in development or progress. Therefore, 'Outdated' is the most appropriate antonym for 'Obsolete.'

Correct Answer: B

Rationale: The correct answer is B. Diameter is defined as the distance across the center of an object, typically a circle. Choice A is incorrect because width refers to the measurement of something from side to side, not necessarily through the center. Choice C is incorrect because height is a measurement from top to bottom, not across the center. Choice D is incorrect because the radius of a circle is the distance from the center to any point on the circle's circumference, not the distance across the center.