The nutrient that is responsible for causing most accidental deaths in children is iron.
The correct answer is D. Stream erosions need water after all.
The pulmonary structures refers to the organs of the body that are involved in the breathing process. These include the nostril, the oral cavity, the trachea, the two lungs, etc. Humans take oxygen from the environment to facilitate the respiratory process, at the same time they release carbon dioxide to the environment using the pulmonary structures.
