Meaning: 'Profoundly' means to a great depth or extent, indicating a significant change.

Wrong options:

• weakening: Weakening is a verb that does not fit grammatically as it does not modify 'altering' and does not convey the intended meaning of depth of change.
• calculations: Calculations is a noun that does not relate to the context of altering brains and does not fit grammatically.
• measures: Measures is a noun that does not modify 'altering' and does not fit the context of describing the change in our brains.
• gradually: Gradually is an adverb that implies a slow process, which contrasts with the intended meaning of a significant and deep change.
• communication: Communication is a noun that does not fit grammatically as it does not modify 'altering' and does not convey the intended meaning.

Correct answer: gradually

Explanation: The term 'gradually' is an adverb that indicates the slow process of strengthening new neural pathways. It fits grammatically as it modifies the verb 'strengthening' and aligns with the context of a gradual change over time.

Meaning: 'Gradually' means slowly over a period of time, indicating a process that takes place step by step.

Wrong options:

• weakening: Weakening is a verb that does not fit grammatically as it does not modify 'strengthening' and does not convey the intended meaning of a slow process.
• calculations: Calculations is a noun that does not relate to the context of strengthening neural pathways and does not fit grammatically.
• measures: Measures is a noun that does not modify 'strengthening' and does not fit the context of describing the process of change.
• profoundly: Profoundly is an adverb that implies a deep change, which contrasts with the intended meaning of a slow, gradual process.
• communication: Communication is a noun that does not fit grammatically as it does not modify 'strengthening' and does not convey the intended meaning.

Correct answer: evolving

Explanation: The word 'evolving' is a verb that describes the ongoing process of change in our brains. It fits grammatically as it serves as the main verb in the sentence and aligns with the context of active change occurring due to technology.

Meaning: 'Evolving' means developing gradually, indicating that our brains are currently undergoing significant changes.

Wrong options:

• weakening: Weakening is a verb that does not fit grammatically as it does not convey the intended meaning of positive change and does not align with the context of evolution.
• calculations: Calculations is a noun that does not relate to the context of brain changes and does not fit grammatically.
• measures: Measures is a noun that does not serve as a verb in this context and does not fit the meaning of change.
• profoundly: Profoundly is an adverb that does not fit grammatically as it does not serve as a verb and does not convey the intended meaning of change.
• communication: Communication is a noun that does not fit grammatically as it does not serve as a verb and does not convey the intended meaning.

Correct answer: altering

Explanation: The word 'altering' is a verb that describes the action of changing how we feel and behave. It fits grammatically as it serves as the main verb in the sentence and aligns with the context of the impact of technology.

Meaning: 'Altering' means changing or modifying, indicating that technology is actively changing our feelings and behaviors.

Wrong options:

• weakening: Weakening is a verb that does not fit grammatically as it does not convey the intended meaning of change in feelings and behaviors.
• calculations: Calculations is a noun that does not relate to the context of changing feelings and behaviors and does not fit grammatically.
• measures: Measures is a noun that does not serve as a verb in this context and does not fit the meaning of change.
• profoundly: Profoundly is an adverb that does not fit grammatically as it does not serve as a verb and does not convey the intended meaning of change.
• communication: Communication is a noun that does not fit grammatically as it does not serve as a verb and does not convey the intended meaning.

Correct answer: communication

Explanation: The word 'communication' is a noun that refers to the act of exchanging information. It fits grammatically as it serves as the object of the sentence and aligns with the context of relying on the Internet for interaction.

Meaning: 'Communication' refers to the process of sharing information or ideas with others.

Wrong options:

• weakening: Weakening is a verb that does not fit grammatically as it does not relate to the context of exchanging information.
• calculations: Calculations is a noun that does not relate to the context of communication and does not fit grammatically.
• measures: Measures is a noun that does not fit the context of exchanging information and does not serve as an object in this context.
• profoundly: Profoundly is an adverb that does not fit grammatically as it does not serve as a noun and does not convey the intended meaning of communication.
• evolving: Evolving is a verb that does not fit grammatically as it does not serve as a noun and does not relate to the context of communication.