Answer:
The purpose of a compare–contrast text structure is to describe how two or more things are similar and different. A compare–contrast text structure will frequently use words like both, unlike, similarly, and in contrast. Comparing texts can help you see their structures and purposes.
Explanation:
The paragraph that tells about the advantage and disadvantage of a an animals, things and objects shows the compare and contrast.
When we compare the similarities and differences of a person is also depicted in compare and contrast.
Water pollution essay can be compare and contrast by its problem and solution.
Many of objects are there that help in showing benefits and loss by their comparison and contrast.
So answer is 2