Natural process diagram in IELTS.
In IELTS writing task 1 process diagrams you will often see a diagram on how something is made or how something works with all the steps included.
Something that used to be quite common in IELTS was a natural process diagram such as the lifecycle of a butterfly, a honey bee or a weather cycle showing evaporation and rainfall. It’s still worth practicing writing about natural processes in case one comes up again in the exam.