What do you think invasive species means?

A species that invades other ecosystems.

What does it mean to invade something?

Move into their territory.

Can animals invade?

Yes. They can just move to another animals area. Like if your dog started sleeping on your bed.

What about plants?

Probably if their roots end up twisting enough they can maybe overlap with other roots.

How might invasive species affect other organisms in their environment?

They might make them have less shelter.