Choose the letter A, B, C or D to answer these following questions

Nature gave us all necessary resources to live and prosper. Now it is in danger and needs our help. What else we can do to protect environment? First of all this decisions must be made on governmental level and provide legal limitations for industries that emit a lot of greenhouse gases. We must unite together in order to protect the place we live in. People are an integral part of nature, we are dependent of it as we cannot imagine our life without nature. So why to destroy environment and bite the hand that feeds you? We must stop deforestation and plant trees on cut down areas. Trees are natural filter of air that absorb carbon dioxide and produce oxygen. Cutting down trees we deprive animals of their natural environment and the soil begin to grow in erosion. Planting trees will save birds and other animals.

We often make forced choices that are advertised on TV. Manufacturers try to rise their profits and sell more products. Sometimes we have so many unnecessary things we do not use. Imagine that you are moving your house, what are the necessary items you may need to live, only several bags. In reality the matter is opposite. There are a lot of things we do not use. People have to reconsider their views of life and promote healthy and ecologically friendly lifestyle. It is up to us to change situation for better and leave good legacy for generations to come.

Question: Why should we plant trees?