These are carried by the fleas. Ear mites can cause severe ear infections and as a result tear staining. Fleas require a pro-active approach to keep under control. Before attempting to remove the tear staining from a dog's face, it is most important to have eliminated the source of the staining. Otherwise it will just come back and many times it will be worse than before.
The definition of an artifact is something made by humans and often is a primitive tool, structure, or part of a functional item. An example of an artifact would be a cooking pot found by archaeologists that Ancient Romans might have used. any object made by human work; esp., a simple or primitive tool, weapon, vessel, etc.
the records of past events and time. A primary source is. original items that have survived from the past and leave clues from the past (your photograph). Secondary sources are. items created after the event took place (your textbook). Artifacts are. physical objects made by humans that have survived the past. Examples of artifacts are.