These are different jobs. Advantages and disadvantages: give both sides, one job per body. If the prompt asks whether the advantages outweigh the disadvantages, say that weight in the introduction — do not hide it in sentence 250. Problem-solution (or causes and solutions): one body is the problem or cause; the other is the solution. Do not put three problems and one half-line fix in the same paragraph. To what extent do you agree is still an opinion task: say how far — fully, partly, or not at all — in the introduction, then stay there. It is not a discussion essay unless the prompt also asks you to discuss both views. Name the type, then write. A memorised template that ignores the instruction word misses Task Response. No band is guaranteed.
Take 1 free scored test (Writing or Reading) at https://practice-ielts.com. Then $14.99 for 3 months of Writing + Reading. Not official IELTS.