The Ozone Layer is part of Earth's Stratosphere.
Answer:
pathogens is the correct answer.
Explanation:
A pathogen is an infectious agent that causes diseases.
Examples of pathogens that cause disease are bacteria, protozoa, fungi, helminths, viruses, and protozoa.
when pathogens enter the host body through nose, eyes, bites, mouth and it destructs the host immune system that causes infectious disease.
diseases caused by infectious agents are cholera, dysentery, tuberculosis, bubonic plague, typhoid, and pneumonia, etc.
If a boater sounds five short blasts on a horn, it represents danger, or that the boater does not understand the approaching boat's intentions.
If the boater sees another boat approaching him, and he suspects that something fishy is going on, or he doesn't understand what the other boat is trying to do, he will sound five short blasts on his horn, in order to show that something is wrong.
