Well, I myself am trying to find out why they are helpful, but landslides are harmful because they can cause injuries, death, buried houses, and people being handicapped and buried alive. Hope that helps! :)
They are helpful because they clean out intestines. they are harmful because they can cause diseases
Bacteria can be both harmful and helpful. Harmful bacteria can cause diseases in humans, animals, and plants. However, some bacteria are beneficial and play important roles in processes like digestion, nutrient cycling, and decomposition.
Bacteria can be helpful by deleting bad viruses and harmful by killing you
If it is harmful it will not survive long
a bacillus bacteria
If you need help I recommend you type in the specific question you need help with
it can be helpful or harmful
sometimes they are helpful and harmful.
Sandpaper is both helpful and harmful.
they are helpful not harmful to plants
helpful
helpful
Depends on what part of "harmful" or "helpful" you are referring to.
Harmful bacteria will harm you. Helpful bacteria will help you.
Slash and burn does not sound helpful, it sounds harmful.
helpful
Helpful.