Meaning: 'How' refers to the way in which something happens or is done, indicating the manner of perception and response.

Wrong options:

• what process: 'What process' is a phrase that implies a specific method or series of actions, which does not align with the general inquiry about perception.
• which way: 'Which way' suggests a choice among options, but does not appropriately fit the context of describing the manner of perception.
• that: 'That' is a demonstrative pronoun that does not function as a question word, making it grammatically incorrect in this context.

Correct answer: identified

Explanation: The verb 'identified' is correctly used in the past tense to indicate that the participants recognized or labeled themselves as cannabis users, aligning with the grammatical structure of the sentence.

Meaning: 'Identified' means to recognize or establish what something is, in this case, the participants' self-categorization as cannabis users.

Wrong options:

• positioned: 'Positioned' implies a physical placement or arrangement, which does not fit the context of self-recognition.
• referred: 'Referred' suggests mentioning or alluding to something, but does not convey the act of self-labeling accurately.
• mentioned: 'Mentioned' indicates a casual reference, lacking the specificity of self-identification required in this context.

Correct answer: expressions

Explanation: The term 'expressions' is appropriate as it refers to the visible manifestations of emotions on faces, fitting both grammatically and contextually within the sentence.

Meaning: 'Expressions' refer to the facial movements or features that convey emotions, such as happiness or sadness.

Wrong options:

• presents: 'Presents' typically refers to gifts or the act of showing something, which does not relate to facial cues of emotion.
• textiles: 'Textiles' refers to fabrics or cloth, which is irrelevant in the context of human emotions and faces.
• postures: 'Postures' relates to body positions rather than facial cues, making it unsuitable for describing emotional expressions.

Correct answer: especially

Explanation: The word 'especially' is used to emphasize a particular instance or case, fitting well in the context of highlighting the specific emotion of anger among negative emotions.

Meaning: 'Especially' means particularly or notably, indicating that anger is a significant focus in the findings regarding brain activity.

Wrong options:

• strongly: 'Strongly' implies intensity but does not convey the specific emphasis on anger as effectively as 'especially.'
• partially: 'Partially' suggests incompleteness, which does not align with the intent to emphasize a specific emotion.
• practically: 'Practically' implies a sense of feasibility or almost, which does not fit the context of emphasizing a particular emotion.

Correct answer: counter

Explanation: The verb 'counter' is appropriate as it means to act against or offset something, fitting grammatically and contextually in the sentence regarding the brain's ability to manage emotional processing.

Meaning: 'Counter' means to oppose or act against, indicating that the brain can mitigate the effects of cannabis on emotion processing.

Wrong options:

• cherish: 'Cherish' means to hold dear or value, which does not fit the context of opposing effects on emotional processing.
• prolong: 'Prolong' means to extend in time, which does not relate to the idea of counteracting effects.
• mimic: 'Mimic' means to imitate, which does not convey the idea of opposing or offsetting the effects of cannabis.