Meaning: 'Sleeping' refers to the state of rest where animals are inactive, which is crucial for their health and survival.

Wrong options:

• activity: 'Activity' is too broad and does not specifically relate to the rest needed by nocturnal animals, making it less suitable in this context.
• predatory: 'Predatory' describes a behavior related to hunting, which does not fit the context of cycles affected by light.
• mating: 'Mating' refers to reproduction, which is not the primary focus of the sentence discussing the effects of light on sleep.

Correct answer: disoriented

Explanation: The term 'disoriented' accurately describes the confusion that birds may experience due to bright city lights, fitting both grammatically and contextually within the sentence about migration patterns.

Meaning: 'Disoriented' means being confused or unable to determine direction, which is a direct consequence of the bright lights for migrating birds.

Wrong options:

• attracted: 'Attracted' implies a positive response to light, which contradicts the negative impact described in the context.
• repelled: 'Repelled' suggests a forceful avoidance, which does not accurately capture the confusion experienced by birds in this scenario.
• unaffected: 'Unaffected' indicates no impact, which is contrary to the premise that bright lights disrupt migration.

Correct answer: colour

Explanation: The word 'colour' fits well as it specifies the type of spectrum lights that are less disruptive, aligning with the context of wildlife-friendly initiatives and their intended effects.

Meaning: 'Colour' in this context refers to the specific wavelengths of light that can be less harmful to wildlife, promoting better ecological practices.

Wrong options:

• narrow: 'Narrow' does not specify the type of light spectrum in a way that relates to its impact on wildlife, making it less relevant here.
• broad: 'Broad' suggests a wide range, which does not convey the targeted approach needed for wildlife-friendly lighting.
• dim: 'Dim' refers to the intensity of light rather than its spectral quality, which is not the focus of the sentence.

Correct answer: harmonious

Explanation: The word 'harmonious' fits perfectly as it describes a balanced and pleasant environment, which is the desired outcome of implementing wildlife-friendly lighting initiatives.

Meaning: 'Harmonious' means creating a pleasing and balanced relationship between human activities and wildlife, promoting coexistence.

Wrong options:

• chaotic: 'Chaotic' implies disorder, which contradicts the goal of creating a balanced environment for both humans and wildlife.
• silent: 'Silent' does not capture the essence of a balanced environment, as it focuses solely on noise rather than ecological harmony.
• boisterous: 'Boisterous' suggests loudness and energy, which is contrary to the peaceful coexistence intended in the context.