Animals that produce poison.
lion are useful and harmful
i think its both harmful and useful
Any thing at all... from Yash Patki
changes both harmful and useful
both
all animals are usefull !
Yes.
both, depending on circumstances
1. You will let train them regularly.
it is harmful for plants and useful for animals
In what ways is antarctica be useful for humans
It is both, and both to a very great degree.