Meaning: 'Short' means lacking in quantity or extent; in this context, it refers to not doing enough to reduce emissions.

Wrong options:

• vigilant: 'Vigilant' is an adjective meaning watchful or alert, which does not fit the context of discussing emissions reduction.
• unconscious: 'Unconscious' refers to a state of being unaware or lacking awareness, which is irrelevant to the context of emissions.
• respective: 'Respective' means relating to each of two or more things, which does not apply to the context of emissions reduction.

Correct answer: insufficient

Explanation: The term 'insufficient' is appropriate as it describes the level of actions and support for developing countries, indicating that they are not enough to address the growing climate risks. This fits both grammatically and contextually.

Meaning: 'Insufficient' means not enough or inadequate; here, it refers to the lack of adequate support for developing countries.

Wrong options:

• vulnerable: 'Vulnerable' describes a state of being exposed to harm, which does not fit as it does not describe the level of support.
• vigilant: 'Vigilant' means being watchful, which does not relate to the adequacy of actions or support.
• short: 'Short' implies a lack but does not specifically convey the idea of inadequacy in support, making it less precise than 'insufficient.'
• unconscious: 'Unconscious' is unrelated to the context of support and actions, as it refers to a lack of awareness.

Correct answer: vulnerable

Explanation: The word 'vulnerable' accurately describes the countries and communities that are at risk from climate impacts. It fits grammatically as it serves as an adjective modifying 'countries and communities,' indicating their susceptibility to harm.

Meaning: 'Vulnerable' means exposed to the possibility of being harmed or attacked; in this context, it refers to those most affected by climate change.

Wrong options:

• insufficient: 'Insufficient' describes a lack of support, which does not fit as it does not describe the state of countries or communities.
• vigilant: 'Vigilant' means watchful, which does not apply to the context of describing countries affected by climate change.
• short: 'Short' does not convey the idea of susceptibility or risk, making it inappropriate for describing countries in this context.
• unconscious: 'Unconscious' refers to a lack of awareness, which is irrelevant to the context of vulnerability.