As human beings, we depend on plants for a number of reasons. They give us food, wood to build houses and furniture, paper, medicines and clothes. Like all living things, plants also have their own life cycle. The following picture can help you understand it.

根据以上科普材料，在1至4处填写A、B、C、D四段文字，使其相匹配；并回答第5小题。
A. A small shoot comes from the seed.
B. The plant forms seeds and the life cycle starts all over again.
C. The shoot grows and becomes bigger. It can get energy from the sunshine. Roots start forming and going into the soil.
D. The stem becomes stronger and taller. It starts having leaves and flowers.
What is the best title of this passage?
A. Life Cycle of a Plant  B. I Love Plants   C. How to Plant   D. Roots and Stems