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🔑:Photosynthesis is crucial for the ecosystem as it is the process by which plants, algae, and some bacteria convert sunlight into chemical energy, producing oxygen as a byproduct. This process not only sustains the plants' growth but also forms the foundation of food webs, supporting all life forms by providing energy and oxygen for respiration.

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🔑:The American Revolution (1775-1783) significantly shaped modern democracy by establishing the principle of self-governance. The revolution challenged monarchical rule and promoted ideals of liberty, equality, and democratic representation, leading to the creation of the U.S. Constitution and inspiring democratic movements worldwide.

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🔑:1. Gardening: The practice of cultivating plants, which can provide food, flowers, or beauty, promoting relaxation and physical activity.2. Photography: Capturing images using a camera, allowing individuals to express creativity and document moments.3. Knitting: A craft involving creating fabric by interlocking yarn loops, often leading to finished projects like scarves or sweaters.4. Cooking: The art of preparing food, which can be both a creative outlet and a practical skill for nourishment.5. Hiking: Exploring nature on foot, offering exercise and an opportunity to connect with the outdoors.

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🔑:Social media plays a pivotal role in modern communication by facilitating instant connectivity and sharing of information across vast networks. It allows individuals and organizations to engage with audiences, share ideas, and foster community while also raising challenges related to misinformation and privacy.