all animals are usefull !
yes
Chickens are extremely useful. Chickens, and their eggs, are an important food source for people.
Some foods may be harmful.
lion are useful and harmful
It is not harmful. Also it is not useful
The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes
useful
i think its both harmful and useful
The bat star, also known as sea bat, is a type of echinoderm. It is harmful because it oozes very acidic digestive juices when it feels threatened.
Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
It is useful because we can breathe it.
useful for dieing (;