Meaning: 'Enhance' means to make something better or to improve it.

Wrong options:

• passive: 'Passive' is an adjective that describes a state of being inactive, which does not fit the context of improving flow.
• synthetic: 'Synthetic' is an adjective that refers to something made by chemical synthesis, which does not relate to the action of improving pedestrian flow.
• conventional: 'Conventional' is an adjective that describes something that is traditional or standard, which does not convey the action of improvement.
• disrupt: 'Disrupt' is a verb that means to interrupt or disturb, which is the opposite of enhancing flow.

Correct answer: interactive

Explanation: The term 'interactive' is an adjective that describes activities that involve participation and engagement. It fits contextually as it describes the nature of activities designed for all ages in the park.

Meaning: 'Interactive' refers to activities that require active participation from individuals.

Wrong options:

• passive: 'Passive' is an adjective that indicates a lack of action or engagement, which contradicts the idea of activities for all ages.
• synthetic: 'Synthetic' is an adjective that refers to something made through chemical processes, which does not describe the nature of activities.
• conventional: 'Conventional' is an adjective that describes something traditional, which does not fit the context of engaging activities.
• ecological: 'Ecological' is an adjective that relates to the environment, which does not describe the nature of activities.

Correct answer: synthetic

Explanation: The word 'synthetic' is an adjective that describes materials made through chemical processes. It fits grammatically and contextually as it describes the type of materials used in playground equipment and seating areas.

Meaning: 'Synthetic' refers to materials that are artificially made rather than naturally occurring.

Wrong options:

• passive: 'Passive' is an adjective that does not describe materials and does not fit in this context.
• conventional: 'Conventional' is an adjective that describes something traditional, which does not accurately describe the materials used.
• disrupt: 'Disrupt' is a verb that means to interrupt, which does not relate to the type of materials.
• ecological: 'Ecological' is an adjective that pertains to the environment, which does not describe the nature of the materials.

Correct answer: ecological

Explanation: The term 'ecological' is an adjective that relates to the relationship between living organisms and their environment. It fits contextually as it describes the type of gardens that contribute to biodiversity.

Meaning: 'Ecological' refers to anything related to the environment and the interactions within it.

Wrong options:

• passive: 'Passive' is an adjective that does not describe gardens and does not fit in this context.
• synthetic: 'Synthetic' is an adjective that refers to materials made through chemical processes, which does not describe the nature of gardens.
• conventional: 'Conventional' is an adjective that describes something traditional, which does not fit the context of gardens that enhance biodiversity.
• interactive: 'Interactive' is an adjective that describes activities involving participation, which does not relate to the type of gardens.