Is a proposition that has not been empirically proven yet, and that attempts to describe or justify a system or phenomenon.
Answer:
irritate people's breathing, ling cancer, asthma
Explanation:
Particulate matter in the air decreases life expectancy according to many researchers. Pollutants such as ozone irritate people's breathing, trigger asthma symptoms and cause lung and heart diseases. Exposure to environmental tobacco smoke causes many severe respiratory health problems such as asthma and lung cancer.
Answer: they have to maintain homeostasis, so they remove waste to do so..
<span>D.water and carbon dioxide</span>
Cos they dont have vascular structure that can defeat gravity and transport water and minerals
