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
sometimes they are helpful and harmful.
Ladybird's favorite food is Aphid (greenfly/blackfly) which attack plants. Ladybirds are a beneficial insect and gardners and Horticulturalists encourage them.
Bacteria can be both harmful and helpful
Sandpaper is both helpful and harmful.
they are helpful not harmful to plants
harmful
Depends on what part of "harmful" or "helpful" you are referring to.
helpful
Helpful