大樹的禮物 (Nature)

1. What is a tree?

1.1. Plant

1.1.1. How to grow plants?

1.1.1.1. Seed

1.1.1.2. Soil

1.1.1.3. Light

1.1.1.4. Water

1.2. Parts of a tree

1.2.1. Leaf

1.2.2. Tree trunk

1.2.3. Roots

2. What are the benefits of a tree?

2.1. Flower

2.2. Food

2.2.1. Fruits

2.2.2. Nuts

2.3. Oxygen

2.4. Leaf

2.5. Wood

2.5.1. Paper

2.5.2. Books

2.5.3. Furniture

3. Who is living in the tree?

3.1. Insects

3.2. Animals

3.2.1. Birds

3.2.2. Monkeys

3.2.3. Squirrels

4. How to protect the environment?

4.1. 3Rs

4.1.1. Reuse

4.1.2. Reduce

4.1.3. Recycle