Certainly "it" can be employed in all those constructions and others, but soem of the illustrations could use changes. I almost never see any of your 4 variations talked about in the original write-up. All 4 of those variations are correct. A person could argue that they are more acceptable https://petskyonline-onlinestrore.blogspot.com/2025/07/top-10-aquarium-essentials-for-new-fish.html