Common Mistakes

This essay will first suggest that the biggest problem caused by this phenomenon is the flooding of homes and then submit building flood protection as the most viable solution. 

Our introduction will, therefore, look like this:

Climate change is among the principal dangers facing people this century and ocean levels are increasing dramatically. This essay will first suggest that the biggest problem caused by this phenomenon is the flooding of homes and then submit building flood protection as the most viable solution. 

It should be noted that this introduction does not contain a thesis statement. This is because this particular question does not ask us for our opinion. However, IELTS problem solution questions sometimes do ask you for your opinion and you should then include a thesis statement.