Answer:
In agriculture, leaching is the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. ... As water from rain, flooding, or other sources seeps into the ground, it can dissolve chemicals and carry them into the underground water supply.
1) pathogen
2) viruses
Some bacteria are not harmful to your body hence not all of them are pathogens
Things of the same species have similar morphology and can INTERBREED
