Meaning: Ending refers to the act of coming to a conclusion or termination, in this case, the disposal of plastic waste.

Wrong options:

• mitigating: Mitigating is a gerund that means to lessen or reduce, which does not fit the context of describing where plastic waste goes.
• forecasting: Forecasting is a gerund that means predicting future events, which is unrelated to the action of plastic waste accumulation.
• emphasizing: Emphasizing is a gerund that means to give importance to something, which does not describe the action of plastic waste.
• proving: Proving is a gerund that means to demonstrate the truth of something, which does not relate to the disposal of plastic waste.
• in spite of: In spite of is a prepositional phrase indicating contrast, which does not fit grammatically or contextually in this sentence.
• due to: Due to is a prepositional phrase indicating a reason, which does not fit as it does not describe an action.

Correct answer: mitigating

Explanation: The term 'mitigating' is a gerund that fits grammatically as it serves as the object of the preposition 'in,' indicating the action of reducing the severity of the issue. It is contextually appropriate as it relates to the efforts to address plastic waste.

Meaning: Mitigating means to make something less severe, serious, or painful, in this case, the issue of plastic waste.

Wrong options:

• ending: Ending does not fit here as it refers to the conclusion of an action rather than the action of reducing an issue.
• forecasting: Forecasting is unrelated to the action of reducing or addressing an issue, making it contextually inappropriate.
• emphasizing: Emphasizing does not relate to the action of reducing the issue and instead suggests highlighting importance, which is not the focus here.
• proving: Proving does not fit as it refers to demonstrating truth, which is not relevant to the context of addressing plastic waste.
• in spite of: In spite of is a prepositional phrase indicating contrast, which does not fit grammatically or contextually in this sentence.
• due to: Due to is a prepositional phrase indicating a reason, which does not describe an action related to addressing the issue.

Correct answer: due to

Explanation: The phrase 'due to' functions as a prepositional phrase that indicates the reason for the challenges faced in recycling efforts. It fits grammatically and contextually as it introduces the cause of the difficulties in processing plastics.

Meaning: Due to means because of, indicating the reason for the challenges faced in recycling.

Wrong options:

• ending: Ending does not fit as it does not indicate a reason or cause, but rather an action.
• mitigating: Mitigating does not serve as a reason; it describes an action of reducing rather than explaining challenges.
• forecasting: Forecasting does not relate to the context of challenges and does not indicate a reason for them.
• emphasizing: Emphasizing does not provide a reason; it suggests highlighting importance, which is not relevant here.
• in spite of: In spite of indicates contrast rather than causation, making it inappropriate for explaining challenges.
• proving: Proving does not fit as it does not indicate a reason or cause for the challenges faced.

Correct answer: emphasizing

Explanation: The word 'emphasizing' is a gerund that fits grammatically as it serves as the subject of the clause, indicating the action of highlighting the need for change. It aligns with the context of discussing the importance of innovations in reducing plastic waste.

Meaning: Emphasizing means to give special importance or prominence to something, in this case, the need for a sustainable economy.

Wrong options:

• ending: Ending does not fit as it does not convey the action of highlighting importance, but rather suggests a conclusion.
• mitigating: Mitigating does not fit as it describes the action of reducing rather than highlighting a need.
• forecasting: Forecasting does not relate to the context of emphasizing a need; it refers to predicting future events.
• proving: Proving does not fit as it does not convey the action of highlighting importance, but rather demonstrating truth.
• in spite of: In spite of indicates contrast and does not fit the context of emphasizing a need.
• due to: Due to indicates a reason, which does not fit as it does not convey the action of highlighting importance.