Meaning: 'Research' refers to the systematic investigation into a subject to discover or revise facts, theories, or applications.

Wrong options:

• interpret: 'Interpret' is a verb that means to explain the meaning of something, which does not fit as it does not describe the action of planning to study a topic.
• involve: 'Involve' is a verb that means to include or engage, which does not fit as it does not describe the action of studying or investigating a topic.
• analyse: 'Analyse' is a verb that means to examine in detail, which does not fit as it does not describe the initial action of planning a study.
• investigate: 'Investigate' is a verb that means to carry out research or study, which does not fit as it does not serve as a noun in this context.

Correct answer: investigate

Explanation: The term 'investigate' is a verb that fits grammatically as it describes the action the research will undertake. It is contextually appropriate as it indicates the process of examining how stress affects working lives.

Meaning: 'Investigate' means to carry out a systematic or formal inquiry to discover and examine the facts.

Wrong options:

• research: 'Research' is a noun in this context, which does not fit as it does not describe an action that the study will perform.
• involve: 'Involve' is a verb that means to include or engage, which does not accurately describe the action of examining or studying.
• analyse: 'Analyse' is a verb that refers to examining data, which does not fit as it does not describe the initial action of the research.
• interpret: 'Interpret' is a verb that means to explain the meaning of something, which does not fit as it does not describe the action of examining the effects of stress.

Correct answer: analyse

Explanation: The word 'analyse' is a verb that fits grammatically as it describes the action the scientists will take after collecting data. It is contextually relevant as it indicates the process of examining the data gathered from the study.

Meaning: 'Analyse' means to examine something in detail in order to understand it better or draw conclusions from it.

Wrong options:

• research: 'Research' is a noun that does not fit as it does not describe an action related to data processing.
• interpret: 'Interpret' is a verb that means to explain the meaning of something, which does not fit as it does not describe the action of examining data.
• investigate: 'Investigate' is a verb that means to carry out research, which does not fit as it does not describe the action of examining collected data.
• involve: 'Involve' is a verb that means to include or engage, which does not fit as it does not describe the action of processing data.

Correct answer: interpret

Explanation: The term 'interpret' is a verb that fits grammatically as it describes the action of explaining the results after data analysis. It is contextually appropriate as it indicates the process of making sense of the findings from the research.

Meaning: 'Interpret' means to explain the meaning or significance of something, particularly the results of the research.

Wrong options:

• research: 'Research' is a noun that does not fit as it does not describe an action related to explaining results.
• analyse: 'Analyse' is a verb that means to examine data, which does not fit as it does not describe the action of explaining results.
• investigate: 'Investigate' is a verb that means to carry out research, which does not fit as it does not describe the action of explaining findings.
• involve: 'Involve' is a verb that means to include or engage, which does not fit as it does not describe the action of explaining results.

Correct answer: identify

Explanation: The word 'identify' is a verb that fits grammatically as it describes the action of recognizing or determining ways that stress chemicals affect working lives. It is contextually relevant as it indicates the goal of the research findings.

Meaning: 'Identify' means to recognize or establish what something is, particularly in the context of determining effects or outcomes.

Wrong options:

• research: 'Research' is a noun that does not fit as it does not describe an action related to recognizing effects.
• interpret: 'Interpret' is a verb that means to explain the meaning of something, which does not fit as it does not describe the action of recognizing effects.
• analyse: 'Analyse' is a verb that means to examine data, which does not fit as it does not describe the action of recognizing outcomes.
• involve: 'Involve' is a verb that means to include or engage, which does not fit as it does not describe the action of recognizing effects.