A host to feed off of, the right temperatures, basically the right living conditions for that type of bacteria. Most of the time it depends on the type of bacteria.
In Geography, when you mention characteristics, it refers to the actions and the ideas of man that changes or changed the Earth. Characteristics in Geography can also refer to as the natural and current features seen all around the Earth.
Answer:
physically, our fingerprints make us all unqiue. We also all think different and no two of us look exactly the same
One type of weathering is man made weathering. (For example) Humans may carve a rock or mine for minerals. Another type is natural weathering. This is when a river may push a rock or lighting may scratch a tree. That weathering is naturally occurring. Hope that helped!