Meaning: 'However' means 'in spite of that' or 'nevertheless,' signaling a contrast to the previous statement about music and IQ.

Wrong options:

• Therefore: 'Therefore' implies a conclusion or result, which does not fit the context of contrasting ideas presented in the sentence.
• Consequently: 'Consequently' indicates a result or effect, which is not appropriate here as the sentence is introducing a contrasting point rather than a consequence.
• While: 'While' suggests a simultaneous occurrence or comparison, but it does not effectively convey the contrast needed in this context.

Correct answer: tests

Explanation: The term 'tests' is a noun that fits grammatically as the object of the preposition 'from,' indicating the source of scientific evidence. It is plural, which is appropriate given the context of multiple assessments being referenced.

Meaning: 'Tests' refers to assessments or evaluations used to measure intelligence or other abilities scientifically.

Wrong options:

• test: 'Test' is singular and does not match the plural context required here, as it implies multiple assessments are needed.
• tested: 'Tested' is a past participle and does not function as a noun in this context, making it grammatically incorrect.
• testing: 'Testing' is a gerund and does not fit as a noun in this context, as it refers to the act rather than the assessments themselves.

Correct answer: process

Explanation: The word 'process' is a noun that fits grammatically as the subject of the sentence, indicating the method or procedure involved in the research. It aligns contextually with the idea of conducting research and the steps taken to achieve results.

Meaning: 'Process' refers to a series of actions or steps taken to achieve a particular end, in this case, the research methodology.

Wrong options:

• goal: 'Goal' implies an objective or aim, which does not accurately describe the method of research being discussed.
• implication: 'Implication' refers to a conclusion that can be drawn from something, which does not fit the context of describing the research method.
• odd: 'Odd' is an adjective that does not fit grammatically or contextually, as it does not relate to the research process.

Correct answer: exhibited

Explanation: The verb 'exhibited' fits grammatically in the past tense, indicating an action performed by the children. It aligns contextually with the idea of showing or demonstrating an increase in IQ points as a result of music lessons.

Meaning: 'Exhibited' means to show or display, in this case, referring to the children showing an increase in IQ.

Wrong options:

• taught: 'Taught' implies the act of instructing, which does not fit the context of children showing an increase in IQ.
• learned: 'Learned' suggests acquiring knowledge, but it does not convey the action of demonstrating an increase in IQ points.
• threatened: 'Threatened' implies a sense of danger or risk, which is completely unrelated to the context of IQ increase.

Correct answer: lighter

Explanation: The adjective 'lighter' fits grammatically as a comparative form, contrasting with 'heavy food.' It aligns contextually with the idea of comparing different types of food based on their perceived satisfaction.

Meaning: 'Lighter' refers to food that is less heavy or dense, often perceived as healthier or less filling compared to heavier options.

Wrong options:

• choosy: 'Choosy' is an adjective describing someone who is selective, which does not fit the context of comparing food types.
• cushiony: 'Cushiony' describes a texture rather than a type of food, making it irrelevant in this context.
• spooky: 'Spooky' refers to something frightening or eerie, which is unrelated to the discussion of food types.

Correct answer: illusion

Explanation: The noun 'illusion' fits grammatically as the subject of the sentence, indicating a false perception or belief. It aligns contextually with the idea of people's misconceptions about light drinks being healthier.

Meaning: 'Illusion' refers to a false idea or belief, in this case, the mistaken belief that light drinks are healthier than they actually are.

Wrong options:

• sight: 'Sight' refers to the ability to see, which does not fit the context of discussing perceptions or beliefs about health.
• anecdote: 'Anecdote' refers to a short, amusing story, which is irrelevant in the context of discussing perceptions about drinks.
• intention: 'Intention' refers to a plan or purpose, which does not fit the context of discussing misconceptions or perceptions.