Trees comprise perennial and woody plants with long trunks and branches with leaves.
The lifespan of most trees is long as they can achieve several decades or centuries.
Trees are firmly supported in the ground by systems of roots, which obtain nutrients and moisture from the rocks and soil.
Tree branches, shoots, and leaves use light energy and photosynthesis to generate sugar and energy necessary for development.
Reproduction of trees is via seeds or pollen cones.
The significance of trees in the environment is mitigating soil erosion and regulating weather and climate.
Also, trees absorb and store carbon dioxide from the air while releasing oxygen in sufficient quantities that benefit animals.
A collection of trees is known as a forest, which offers a habitat for diverse categories of plants and animals.
In the human population, trees have value as a source of shade, shelter, energy, nutrition, and medicine materials.
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