Meaning: 'Chemistry' refers to the branch of science that deals with the properties, composition, and behavior of substances.

Wrong options:

• engaging: The word 'engaging' is an adjective and does not fit grammatically as it cannot complete the phrase 'teach solid __BLANK 1__.'
• distinguishes: The word 'distinguishes' is a verb that does not fit in the context of teaching a subject, as it does not represent a field of study.
• differs: The word 'differs' is a verb and does not fit grammatically in this context, as it does not represent a subject matter.
• hiring: The word 'hiring' is a gerund that does not relate to the subject of chemistry and does not fit grammatically.
• undermine: The word 'undermine' is a verb that does not fit in the context of teaching a subject, as it does not represent a field of study.

Correct answer: differs

Explanation: The word 'differs' is a verb that fits grammatically as it describes the action of the teaching approach in relation to Phoenix's past experiences. It aligns with the context of contrasting current teaching methods with those of the past.

Meaning: 'Differs' means to be unlike or distinct in nature, form, or characteristics.

Wrong options:

• chemistry: The word 'chemistry' is a noun and does not fit grammatically as it does not describe an action or state of being.
• engaging: The word 'engaging' is an adjective and does not fit grammatically as it cannot describe how the teaching approach relates to the past.
• distinguishes: The word 'distinguishes' is a verb that implies making a distinction, but it does not fit the context of comparing teaching methods.
• hiring: The word 'hiring' is a gerund that does not relate to the action of teaching and does not fit grammatically.
• undermine: The word 'undermine' is a verb that implies weakening something, which does not fit the context of describing a teaching approach.

Correct answer: engaging

Explanation: The word 'engaging' is an adjective that fits grammatically as it describes the teaching approach, indicating that it captures students' interest. This aligns with the context of making learning more appealing.

Meaning: 'Engaging' means attracting or holding interest or attention.

Wrong options:

• chemistry: The word 'chemistry' is a noun and does not fit grammatically as it cannot describe the teaching approach.
• differs: The word 'differs' is a verb and does not fit grammatically as it cannot describe the quality of the teaching approach.
• distinguishes: The word 'distinguishes' is a verb that does not fit in this context, as it cannot describe the nature of the teaching approach.
• hiring: The word 'hiring' is a gerund that does not relate to the quality of teaching and does not fit grammatically.
• undermine: The word 'undermine' is a verb that implies weakening something, which does not fit the context of describing a teaching approach.