Some people are... *_*
monerans are helpful to humans because it is bacteria and bacteria helps humans by making milk yogurt
An aolovera plant is helpful
no
Ladybugs are indeed helpful to humans, because they eat aphids, and aphids are damaging to many plants that we humans like to grow.
no
cause
you can eat them
Helpful in the stratosphere, harmful in the troposphere.
computer.. both helpful and not..
all that i can think of is gives humans meat to eat
yes
Bob