Greetings!
Organisms in an ecosystem can be affected by humans in many ways. As well known, we have the most control over our environment. Therefore, we affect it the most as well.
We affect other organisms by many of the things we do. For instance, throwing trash on the ground outside may affect a near by living creature. That creature may eat the trash, and that can badly affect them.
See what I mean?
Hope this helps!
