Cutting down trees has a negative impact on an ecosystem.
And, trees provide habitat for birds and animals.
Removing habitats has a negative impact on an ecosystem?
What is bad for ecosystems?
Options:
(a) Pesticides
(b) deforestation
(c) harmful substances
(d) Studying animal populations
(e) Removing pollutants
(f) Pollution
(g) Fighting climate change
(h) Removing habitats