Abloated corpse was found in the woods with no ants how many days was it there

It had just died that day (because otherwise the ants would've been crawling all over the corpse).

1 day is the correct one

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs