Meaning: 'Combat' means to take action to reduce or prevent something harmful, in this case, climate change.

Wrong options:

• exacerbate: 'Exacerbate' means to make a problem worse, which contradicts the intended meaning of addressing climate change.
• ignore: 'Ignore' means to pay no attention to something, which is the opposite of what urban planners aim to do regarding climate change.
• adjust: 'Adjust' implies making small changes, which does not convey the active effort needed to fight climate change impacts.

Correct answer: maintaining

Explanation: The gerund 'maintaining' is grammatically correct as it follows 'require' in the structure 'require __ing'. Contextually, it emphasizes the ongoing effort needed to keep green spaces functional and beneficial.

Meaning: 'Maintaining' means to keep something in good condition or to preserve it over time, which is essential for green spaces.

Wrong options:

• ignoring: 'Ignoring' means to overlook or neglect, which contradicts the need for active management of green spaces.
• disrupting: 'Disrupting' implies causing disorder, which is not relevant to the context of preserving green spaces.
• replacing: 'Replacing' suggests substituting one thing for another, which does not fit the context of upkeep.

Correct answer: refuge

Explanation: The noun 'refuge' fits grammatically as it serves as the object of the verb 'provide'. Contextually, it aligns with the idea that green spaces offer safe habitats for wildlife.

Meaning: 'Refuge' means a safe place or shelter, particularly for animals in this context.

Wrong options:

• challenges: 'Challenges' refers to difficulties or obstacles, which does not fit the context of providing safety for wildlife.
• furniture: 'Furniture' refers to movable objects in a room, which is irrelevant to the context of wildlife habitats.
• entertainment: 'Entertainment' refers to activities that provide enjoyment, which does not relate to the ecological function of green spaces.

Correct answer: engagement

Explanation: The noun 'engagement' fits grammatically as it serves as the object of the noun 'community'. Contextually, it emphasizes the importance of community involvement in conservation efforts.

Meaning: 'Engagement' means active participation or involvement, which is crucial for successful conservation initiatives.

Wrong options:

• detachment: 'Detachment' implies a lack of involvement or connection, which contradicts the need for community participation.
• negligence: 'Negligence' means failure to take proper care, which is the opposite of what is needed for conservation efforts.
• avoidance: 'Avoidance' suggests steering clear of something, which does not align with the proactive approach required for community involvement.

Correct answer: support

Explanation: The verb 'support' is grammatically correct as it agrees with the plural subject 'cities'. Contextually, it conveys the idea that cities can provide for both human and non-human inhabitants.

Meaning: 'Support' means to provide what is needed for someone or something to thrive, which is essential for a balanced ecosystem.

Wrong options:

• supports: 'Supports' is incorrect as it does not agree with the plural subject 'cities'.
• supported: 'Supported' is in the past tense, which does not fit the present context of ongoing actions.
• supporting: 'Supporting' is a gerund that does not fit the structure of the sentence where a simple present verb is required.