Trees are being cut down for lumber in the amazon. in addition new farms and factories are beginning to replace the forests and villages. what is an effect of this human activity? sas

If trees are nature's lungs, then the Amazon, being the biggest and least explored rain forest in the whole World, is the Earth's whole respiratory system. Trees use carbon dioxide and produce oxygen, which means they clean the air. If the Amazon is being ruined and no trees are replaced with new ones, and factories are being built instead, this means that humans contribute to air pollution, leading to disastrous consequences for the whole flora and fauna, climate change and altogether influencing humanity.  

The answer is b im not sure 

Answer mauritania is in the northwestern part of african, meaning its in the western hemisphere, and how do i know/ the map showed me so; ///: )