Complex sentence: Eutrophication arises from the oversupply of nutrients, which induces explosive growth of plants and algae which, when such organisms die, they consume the oxygen in the body of water, thereby creating the state of hypoxia.
Split into simpler sentences: Eutrophication arises from the oversupply of nutrients, which induces explosive growth of plants and algae. When such organisms die, they consume the oxygen in the body of water, thereby creating the state of hypoxia.