How does invasion species upset stability of ecosystem

This is relatively easy for me to answer from my own knowledge: Invasive species disturb environments by increasing competition and destroying the peace in the ecosystem.

Copied answer

The invasive species are the species who are present in a non native ecosystem. The invasion of These species disturbs the environment of particular system by increasing the competition or destroying the vital component of the ecosystem.

(yes I did copy some words from online sources, but if you want to make your answer seem like it wasn't copy paste, I suggest you use my answer)

the answer would be d

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint