I think it is 2)
Hope this help you?
Answer:
Environmental etiology
Explanation:
environmental factors such as exposure to tobacco smoke and herbicides has been linked to increased risk off autism in children.
Answer:
Democracy is form of government in which the power is vested in the hands of the people. The people have the right to choose their governing legislature and they also have the power to change them. Democracy provides an environment that respects human rights and fundamental freedoms, and in which the freely expressed will of people is exercised.
The correct answer are the Barrier Islands.