a xylophone is not an insect, its a instrument
If you need help I recommend you type in the specific question you need help with
Harmful Insect was created in 2002.
it can be helpful or harmful
Ladybird's favorite food is Aphid (greenfly/blackfly) which attack plants. Ladybirds are a beneficial insect and gardners and Horticulturalists encourage them.
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.