The human activity that badly affects stability of the environment is A dumping pollutants Into the oceans because they are putting chemicals that kill sea organisims , its not any of the other answers because if you recycle you aren't hurting the environment creating reserve is helping wild life and planting trees is good because you are helping the atmosphere [side note] trump removed the regulations for dumping pollutants into oceans rivers streams and lakes the world is ending as we know it
