Q: Fact 1: Cutting down trees has a negative impact on an ecosystem. Fact 2: And, trees provide habitat for birds and animals. Given the two facts above, what is bad for ecosystems?

Select from the following.
(1). Pesticides
(2). deforestation
(3). harmful substances
(4). Studying animal populations
(5). Removing pollutants
(6). Pollution
(7). Fighting climate change
(8). Removing habitats
A:
(8).