Meaning: 'Indigenous' means originating or occurring naturally in a particular place; native.

Wrong options:

• flora: Flora refers to the plant life of a particular region, but it does not specifically indicate the native aspect required in this context.
• biodiversity: Biodiversity refers to the variety of life in a particular habitat, which does not fit as it does not describe a type of species.
• water: Water is a noun that does not relate to the type of species being integrated into the park.
• recycling: Recycling is a noun that refers to the process of converting waste into reusable material, which is unrelated to species.
• lighting: Lighting refers to the arrangement or effect of lights, which does not pertain to species in this context.

Correct answer: biodiversity

Explanation: The term 'biodiversity' refers to the variety of life in a particular habitat, which is directly supported by the integration of indigenous species. This fits grammatically as a noun that complements the verb 'support.'

Meaning: 'Biodiversity' means the variety of plant and animal life in a particular habitat, crucial for ecological balance.

Wrong options:

• maintenance: Maintenance refers to the process of keeping something in good condition, which does not relate to the variety of life.
• flora: Flora refers to plant life but does not encompass the broader concept of various species, including animals.
• water: Water is a noun that does not relate to the concept of life variety in ecosystems.
• recycling: Recycling is unrelated to the concept of life forms and their variety in an ecosystem.
• lighting: Lighting does not pertain to biological diversity and is irrelevant in this context.

Correct answer: water

Explanation: The word 'water' fits as a noun that describes the systems being introduced to sustain the green spaces. It is essential for the vitality of plants and aligns with the context of sustainability.

Meaning: 'Water' refers to the clear, colorless liquid that is essential for life and is used here to describe systems that provide it.

Wrong options:

• maintenance: Maintenance refers to the upkeep of the parks but does not describe a system related to sustainability.
• flora: Flora refers to plant life and does not relate to systems that provide essential resources.
• biodiversity: Biodiversity is a concept related to the variety of life, not a system for sustaining green spaces.
• recycling: Recycling refers to waste management and does not pertain to water systems.
• lighting: Lighting refers to illumination and is not relevant to the context of water systems.

Correct answer: maintenance

Explanation: The term 'maintenance' refers to the actions taken to keep the parks in good condition, which is directly supported by community engagement. This noun fits grammatically as the object of the preposition 'in.'

Meaning: 'Maintenance' means the process of preserving or keeping something in good condition.

Wrong options:

• water: Water does not relate to the actions taken by the community regarding upkeep.
• flora: Flora refers to plant life and does not describe the actions of maintaining the parks.
• biodiversity: Biodiversity is a concept that does not pertain to the upkeep of the parks.
• recycling: Recycling refers to waste management and is not relevant to the maintenance of green spaces.
• lighting: Lighting refers to illumination and does not relate to the upkeep of the parks.