Several species or warblers can live in the same spruce tree only because they occupy different nitches within the tree. Hope this helps!
1) pathogen
2) viruses
Some bacteria are not harmful to your body hence not all of them are pathogens
Its ethier loose soil or dense vegetation but i have a feeling its loose soil.
Water had the capability to hold up the thin overhang of the underground.
When water is depleted, there is nothing to support this overhang, which eventually led to the formation of sinkholes.
As for the collective behavior, it's all because of the scarcity. Water is one of human's basic needs to survive. When water is scarce, this will force the people to compete with one another to obtain it, which will cause the behavior
