Plants

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Across
  1. 1. I am eaten by all living beings
  2. 4. I provide oxygen and make this plant green
  3. 5. I am the base of the greenary
  4. 6. I am the most sturdy part
Down
  1. 2. I hold everything together
  2. 3. I make this earth colorful and beautiful
  3. 6. I am the source of energy