Imagine that you are preparing a project with your friend. You have found some interesting material for the presentation and you want to read this text to your friend. You have 1.5 minutes to read the text silently, then be ready to read it out aloud. You will not have more than 1.5 minutes to read it.

The mystery of why trees don’t stop growing is still unsolved. Human beings usually stop growing sometime during their teens. Many animals reach full growth within a year. Others are fully grown in just a few years. Birds and insects also stop growing at a certain age. But trees keep growing as long as they live. Trees live, grow, and reproduce themselves by an amazing process. The thousands of leaves put forth by the tree breathe for it and manufacture its food. Its root system gathers minerals and vast quantities of water. To carry this water to the leaves, the tree is equipped with an intricate circulation system that extends upward from the millions of root hairs through the trunk and branches. The trunk holds the leaves up to the sunlight, sends them water from the roots, and gets food back from them. Then seeds are borne in flowers or cones.