为什么树很重要?(用英语回答,初一水平)

Because the trees can clean the air for us,they absorb the carbon dioxide(CO2),release the oxygen(O2). They make the world to be green,the environment to be more beautiful.If there's no tree,the world will be coverd with dust,the air will be full of carbon dioxide,aslo people and animals cannot live in this world.
Therefore,the trees are very important to us.They are the best friends of ours.

因为树可以净化空气,他们吸收二氧化碳,释放氧气.他们让这个世界有了更多的绿色,美化了我们的环境.如果没有了树,我们的世界将被尘土覆盖,空气中将充满了二氧化碳,人和动物也都无法再生存下去.
因此,树对我们是非常重要的.他们是我们最好的朋友.

why the trees are important？

应该是这样的

Because the root can get nutrition from the soil for the tree.

楼上，注意大写

初一应该教了的吧…………

Why are trees important?

because they can make oxygen.

Because it can make and release oxygen，and make the world more beautiful,giving us a fresh and pretty environment.
因为他制造和释放氧气，使世界更美丽，给予我们一个新鲜而美好的环境