Big plants are called trees that are on our earth from millions of years. These trees exhale oxygen which is crucial for us as without it we cannot live. These give a variety of delicious fruits and nuts to us. Their truck is used for making wood and pulp to be used in forming paper. Their sap is also used for things like maple syrup. Due to all these benefits of trees, one … [Read more...] about Various structures of trees according to different climate conditions