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🔑:Deforestation is primarily caused by agriculture expansion, logging, and urban development. The effects include loss of biodiversity, disruption of ecosystems, and increased greenhouse gas emissions, contributing to climate change. It also impacts local communities reliant on forests for livelihoods and resources.

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🔑:The significance of the theory of relativity lies in its revolutionary change in understanding space and time. It introduced concepts such as the curvature of space due to gravity and the idea that time is relative, shaping our comprehension of the universe and influencing technologies ranging from GPS navigation to nuclear energy.

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🔑:Social media plays a crucial role in modern communication by facilitating instant global connectivity and enabling people to share ideas widely. It provides platforms for social interaction, marketing, and information dissemination. However, it also raises concerns regarding privacy, misinformation, and the impact on mental health.

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🔑:Main themes in "Hamlet" include madness, revenge, mortality, and the complexity of action. The play explores the psychological turmoil of Hamlet as he grapples with existential questions and moral dilemmas, ultimately examining the consequences of revenge and the nature of human experience.

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🔑:The water cycle is significant in ecology as it regulates the distribution of water in various ecosystems, supporting plant and animal life. It promotes nutrient cycling, affects climate patterns, and sustains habitats, illustrating the interconnectedness of environmental systems and the importance of water conservation.

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🔑:The ethical implications of AI in decision-making include concerns about bias in algorithms, accountability for decisions made by machines, privacy violations, and the potential for job displacement. Ensuring transparency and fairness in AI applications is crucial to address these ethical challenges and foster trust in technology.