The sunday challenge = Earth metal wood water fire
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The five elements (earth, wood, fire, water, metal) refer to a Chinese philosophy that says that the five elements constitute everything in our universe. These elements do not just stand on their own but also have specific interactions and relationships with each other.
It is a huge philosophy and used in Chinese medicine, feng shui, fortune-telling, and martial arts. You are welcome to focus on one of the five the elements, a combination of two or more of the elements or of the interactions between the elements.
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Earth, wood and metal are obvious here, fire is necessary for a blacksmith to produce the spade, the colour of the earth tells us water is present