What possible problem does that solve?
you can keep the ecosystem safe by not killing animals or plants because animals need to stay in there habitat and plants they help us live. Example is we you are lost in the wild and there is no plants you might not be able to live. if you do not kill the plants then you might be able to live because some plants provide food and that will help you live. that is how you can keep an ecosystem safe.
killing animals
All herbivores animals eat plants. They live on plants.
the factors limit where plants and animals can live is that a forests
No, because man and animals produce carbon dioxide and plants needs carbon dioxide.
More plants and animals live n the land then in the sea.
Killing Animals is wrong.It is Sad and devastating.People do it for life people do it as culture.Killing Animals is hurting them not letting them live a good life like us.
Yes, plants and animals live in perfect harmony because the animals eat the plants to suvive (some do) and the plants give off O2 so that the animals can breathe; while the animal help the plants by transferring the seeds to different parts of wherever they live.
An ecosystem is a place where plants and animals ( maybe humans ) live and animals and plants live in the desert so … 
Some animals that live in grasslands are lions giraffes and cheetas. I'm not sure about the plants.
well protists give off the oxygen we need about 92% actually and plants 2% and since most protists live in water we are killing animals that let us live
animals are foxes and breeds and plants cactuses