Question

Which of the following is the most effective example of a thesis statement?

Answer 1

Choice a : Explains what the nations need to do and elaborates some. 

--wrong answers--

Choice b only gives a statement of what the nations need to do.

Choice c is a question.

Answer 2

The answer is A. All nations must unite to address the 4 main causes of global warming: natural causes, pollution, increase in population, and deforestation.