How do invasive species spread?

Question

Select all correct responses

a
Climate change expanding territory
b
Accidentally by humans
c
Intentionally by humans
d
In ballast water from internationally traveling ships

Answer 1

b
c
d

Answer 2

I think
a
works too.

Answer 3

Yes, you are correct. Invasive species can spread due to climate change expanding their territories as well. Thank you for pointing that out.

So the correct responses are:

a
b
c
d