Answer:
The correct answer is - in the sporangium at the time of spore generation.
Step-by-step explanation:
Mosses are the member of the bryophyta, a land spore bearing non vascular plant that found almost everywhere in the world except salt waters. Moss plant have two stage life cycle one with haploid cells gametophyte and oth diploid life cycle called sporophyte that bear spores.
Meisis takes place in the sporopthyte stage, in sporangium a specialized structure that produce spores. These spores produce male and female gametophyte by diving in to two.
Thus, the coreect answer is - in the sporangium at the time of spore generation.