Which of the following factors can affect an individual's sleep quality?

Sleep quality is influenced by a variety of interconnected factors that can significantly impact an individual's ability to rest. Stress is a crucial factor; it can lead to anxiety and racing thoughts that make it difficult to fall asleep or stay asleep. When an individual experiences high levels of stress, their body remains in a heightened state of alertness, which can disrupt the natural sleep cycle.

Lifestyle choices also play a vital role in sleep quality. This includes daily habits such as caffeine consumption, exercise, and screen time before bed. For instance, consuming caffeine in the afternoon or evening can hinder one's ability to fall asleep, while excessive use of electronic devices before bedtime can interfere with the body’s natural rhythms due to the blue light emitted by screens.

Environmental factors encompass a broad range of elements, such as noise, light, room temperature, and even the quality of the mattress. A noisy or overly bright room can prevent an individual from falling asleep or can cause frequent awakening during the night.

Therefore, the recognition that all these factors—stress, lifestyle choices, and environmental conditions—intersect to influence sleep quality underscores the complexity of achieving restorative sleep. This comprehensive understanding points to the correct answer as the factors affecting sleep quality are indeed not isolated; they are interrelated and collectively impact