Answer:
3. by studying plants and animals
Explanation:
Bringing harmful plants causes harm to the other species living there.
Destroying a lot of trees takes away a lot of homes from animals.
If you're just studying them no harm is being done.
Using pesticides can cause negative effects to the plants and animals who eat them.
Closed Boston harbor
Resricted government in Massachusetts
Made British immune to prosecution
Required Americans to house British soldiers
Were nicknamed intolerable acts and sparked the revolution
D is not correct because the right one is hong kong