Meaning: 'Action' refers to the process of doing something to achieve an aim, particularly in this context, it means taking steps to combat climate change.

Wrong options:

• activation: 'Activation' implies starting something that is already in place, which does not convey the urgency of taking new measures against climate change.
• activity: 'Activity' is a general term for actions but lacks the specific connotation of urgency and purpose that 'action' conveys in this context.
• act: 'Act' is a verb and does not fit grammatically as a noun in this sentence, which requires a noun to complete the phrase.

Correct answer: pose

Explanation: The verb 'pose' correctly indicates that political inaction and conflicting interests create or present significant challenges, fitting both grammatically and contextually within the sentence structure.

Meaning: 'Pose' means to present or constitute a problem or challenge, which is appropriate in the context of discussing obstacles to addressing climate change.

Wrong options:

• appear: 'Appear' suggests a superficial observation rather than indicating that these challenges are actively creating problems, making it less suitable here.
• cover: 'Cover' implies hiding or concealing, which does not accurately reflect the nature of the challenges posed by political inaction.
• consist: 'Consist' indicates composition or makeup, which does not convey the active nature of challenges that 'pose' does.

Correct answer: afford

Explanation: The verb 'afford' fits grammatically and contextually, indicating that time is a resource we cannot spare or allow ourselves to waste in the fight against climate change.

Meaning: 'Afford' means to have enough resources (in this case, time) to do something, and here it implies that we cannot allow ourselves the luxury of time.

Wrong options:

• compel: 'Compel' means to force or drive someone to do something, which does not fit the context of discussing the availability of time.
• regard: 'Regard' means to consider or think of in a specified way, which does not relate to the concept of having or not having time.
• draw: 'Draw' does not fit grammatically or contextually, as it does not relate to the concept of time management in this context.

Correct answer: decisively

Explanation: The adverb 'decisively' fits well as it emphasizes the need for clear and firm action, aligning with the urgent tone of the message about climate change.

Meaning: 'Decisively' means in a manner that shows the ability to make decisions quickly and effectively, which is crucial in the context of climate action.

Wrong options:

• mainly: 'Mainly' suggests a focus on the primary aspect, which does not convey the urgency and firmness required in the context of taking action.
• solely: 'Solely' implies exclusivity, which does not match the call for collective action indicated in the sentence.
• perfectly: 'Perfectly' suggests an ideal state, which is not the focus here; the emphasis is on the need for urgent and effective action, not perfection.

Correct answer: however

Explanation: The word 'however' serves as a discourse marker that introduces a contrast, indicating that despite the smallness of each action, they still contribute significantly to the overall effort against climate change.

Meaning: 'However' means 'nevertheless' or 'but,' used to introduce a statement that contrasts with or seems to contradict something that has been said previously.

Wrong options:

• whatever: 'Whatever' implies indifference or lack of concern, which does not fit the context of discussing the importance of every action.
• significantly: 'Significantly' is an adverb that describes the degree of contribution but does not serve as a connector in this context.
• easily: 'Easily' suggests a lack of difficulty, which does not convey the intended contrast about the importance of small actions.