There are some aspects you should be careful. If it is necessary, study again the grammar structure, remember that the conditions and the results must go in simple present. Do not forget to answer everything that is asked and mention all the points that are required. It seems to be that you are getting better at using zero conditional; unfortunately your writing is not perfect yet. There are some points that you are forgetting about and checking the grammar structures, punctuation or vocabulary can help you make fewer mistakes the next time. Your writing is really good! There is always something that can be corrected, but you have learnt to use zero conditional in the right way to express true facts. Excellent!