Why are we not sick all of time if pathogens are everywhere?

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Development has provided electrically for less money but what may be considered a cause of nuclear power