a tarantuler is harmful never ever touch its leg or face it contains poison in it bt it is very very harmful.if you want to fight someone first find out if they are scared of them if yes it a helpful thing if no then its not .yes,because they scared that person away and they won't come near that thing again. and then the person will be...
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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.